Frontier Group Holdings, Inc.
For the period ended Dec 31, 2025. Filed Feb 18, 2026.
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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.
FY2025 · Filed Feb 18, 2026
ULCC$8.09-3.1%Stored close · as of Nov 10, 2026
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Item 15. Exhibits and Financial Statement Schedules
(a) Documents filed as part of this Annual Report on Form 10-K:
(1) Consolidated Financial Statements
Our consolidated financial Statements are listed in the “Index to Consolidated Financial Statements” under Part II, Item 8 of this Annual Report on Form 10-K.
(2) Financial Statement Schedules
All financial statement schedules have been omitted because they are not applicable, not material, or the required information is shown in Part II, Item 8 of this Annual Report on Form 10-K.
(3) Exhibits
The exhibits listed below are filed as part of this Annual Report on Form 10-K or are incorporated herein by reference, in each case as indicated below.
| Incorporated by Reference · Filed Herewith | |||||
|---|---|---|---|---|---|
| Exhibit Number | Exhibit Description | Form | File Number | Date | Number |
| 3.1 | Amended and Restated Certificate of Incorporation of Frontier Group Holdings, Inc. | 8-K | 001-40304 | 5/16/2025 | 3.1 |
| 3.2 | Amended and Restated Bylaws of Frontier Group Holdings, Inc. | 8-K | 001-40304 | 7/25/2024 | 3.1 |
| 4.1 | Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934. | 10-K | 001-40304 | 2/18/2025 | 4.1 |
| 4.2 | Form of Common Stock Certificate. | S-1 | 333-254004 | 3/8/2021 | 4.2 |
| 4.3 | Form of Common Stock Warrant. | 10-Q | 001-40304 | 8/8/2024 | 4.2 |
| 4.4 | Registration Rights Agreement, dated April 6, 2021, by and among Frontier Group Holdings, Inc. and Indigo Frontier Holdings Company, LLC. | 8-K | 001-40304 | 4/6/2021 | 4.1 |
| 4.5† | Warrant Agreement, dated as of April 30, 2020, between Frontier Group Holdings, Inc. and the United States Department of the Treasury. | S-1 | 333-254004 | 3/8/2021 | 10.35 |
| 4.6 | Warrant Agreement, dated as of September 28, 2020, between Frontier Group Holdings, Inc. and the United States Department of the Treasury. | S-1 | 333-254004 | 3/8/2021 | 10.38 |
| 4.7 | Warrant Agreement, dated as of January 15, 2021, between Frontier Group Holdings, Inc. and the United States Department of the Treasury. | S-1 | 333-254004 | 3/8/2021 | 10.43 |
| 4.8 | Warrant Agreement, dated as of April 29, 2021, between Frontier Group Holdings, Inc. and the United States Department of the Treasury. | 10-Q | 001-40204 | 5/13/2021 | 4.5 |
| 10.1(a)# | 2014 Equity Incentive Plan. | S-1 | 333-254004 | 3/8/2021 | 10.2(a) |
| 10.1(b)# | Form of Stock Option Grant Notice and Stock Option Agreement under the 2014 Equity Incentive Plan. | S-1 | 333-254004 | 3/8/2021 | 10.2(b) |
| 10.1(c)# | Form of Stock Purchase Right Grant Notice and Restricted Stock Purchase Agreement for Non-Employee Directors. | S-1 | 333-254004 | 3/8/2021 | 10.2(c) |
| 10.1(d)# | Form of Restricted Stock Unit Award Grant Notice and RSU Award Agreement under the 2014 Equity Incentive Plan. | S-1 | 333-254004 | 3/8/2021 | 10.2(d) |
| 10.1(e)# | Form of Performance Stock Unit and Grant Agreement under the 2021 Equity Incentive Plan. | 10-Q | 001-40304 | 5/1/2025 | 10.1 |
| 10.2(a)# | 2021 Incentive Award Plan. | S-1/A | 333-254004 | 3/23/2021 | 10.3(a) |
| 10.2(b)# | Form of Stock Option Grant Notice and Stock Option Agreement under the 2021 Incentive Award Plan. | S-1/A | 333-254004 | 3/19/2021 | 10.3(b) |
| 10.2(c)# | Form of Restricted Stock Award Grant Notice and Restricted Stock Award Agreement under the 2021 Incentive Award Plan. | S-1/A | 333-254004 | 3/19/2021 | 10.3(c) |
| 10.2(d)# | Form of Restricted Stock Unit Award Grant Notice and Restricted Stock Unit Award Agreement under the 2021 Incentive Award Plan, effective for grants after October 25, 2023. | 10-K | 001-40304 | 2/20/2024 | 10.2(d) |
| 10.3# | Form of Indemnification Agreement for directors and officers. | S-1 | 333-254004 | 3/8/2021 | 10.4 |
| 10.4# | Form of Bonus Letter | 8-K | 001-40204 | 6/21/2021 | 10.1 |
| 10.5# | Employment Agreement, dated as of March 15, 2016, by and between Frontier Airlines, Inc. and Barry L. Biffle. | S-1 | 333-254004 | 3/8/2021 | 10.5 |
| 10.6(a)# | Amended and Restated Employment Agreement, dated as of April 13, 2017, by and between Frontier Airlines, Inc. and James G. Dempsey. | S-1 | 333-254004 | 3/8/2021 | 10.6 |
| 10.6(b)# | Amendment to Amended and Restated Employment Agreement, dated as of October 16, 2023, by and between Frontier Airlines, Inc. and James G. Dempsey. | 10-K | 001-40304 | 2/20/2024 | 10.6(b) |
| 10.7# | Employment Letter, dated as of October 16, 2023, by and between Frontier Airlines, Inc. and Mark C. Mitchell. | 10-K | 001-40304 | 2/20/2024 | 10.7 |
| 10.8# | Employment Letter, dated as of February 6, 2024, by and between Frontier Airlines, Inc. and Howard M. Diamond. | 10-Q | 001-40304 | 5/2/2024 | 10.3 |
| 10.9# | Employment Letter, dated as of February 13, 2019, by and between Frontier Airlines, Inc. and Trevor J. Stedke. | S-1 | 333-254004 | 3/8/2021 | 10.11 |
| 10.10# | Employment Letter, dated as of November 30, 2023, by and between Frontier Airlines, Inc. and Alex Clerc. | 10-Q | 001-40304 | 5/2/2024 | 10.1 |
| 10.11# | Employment Letter, dated as of February 6, 2024, by and between Frontier Airlines, Inc. and Steven C. Schuller. | 10-Q | 001-40304 | 5/2/2024 | 10.2 |
| 10.12# | Employment Letter, dated as of February 29, 2024, by and between Frontier Airlines, Inc. and Robert Schroeter. | 10-Q | 001-40304 | 5/2/2024 | 10.4 |
| 10.13# | Employment Letter, dated as of August 28, 2025, by and between Frontier Airlines, Inc. and Jeffrey Mathew | 10-Q | 001-40304 | 11/5/2025 | 10.3 |
| 10.14# | Non-Employee Director Compensation Program, as amended on February 8, 2023. | 10-Q | 001-40304 | 5/3/2023 | 10.1 |
| 10.15# | Professional Services Agreement, dated December 3, 2013, by and among Indigo Partners LLC, Frontier Airlines Holdings, Inc. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.14 |
| 10.15(a)† | Airbus A320 Family Aircraft Purchase Agreement, dated as of September 30, 2011, by and between Airbus S.A.S. and Republic Airways Holdings Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(a) |
| 10.15(b)† | Amended and Restated Letter Agreement No. 1, dated as of December 28, 2017, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(b) |
| 10.15(c)† | Third Amended and Restated Letter Agreement No. 2, dated as of November 13, 2021, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-K | 001-40304 | 2/23/2022 | 10.17(c) |
| 10.15(d)† | Second Amended and Restated Letter Agreement No. 3, dated as of October 9, 2019, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(d) |
| 10.15(e)† | Amended and Restated Letter Agreement No. 4, dated as of December 28, 2017, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(e) |
| 10.15(f)† | Letter Agreement No. 5, dated as of September 30, 2011, by and between Airbus S.A.S. and Republic Airways Holdings Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(f) |
| 10.15(g)† | Letter Agreement No. 6A, dated as of September 30, 2011, by and between Airbus S.A.S. and Republic Airways Holdings Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(g) |
| 10.15(h)† | Letter Agreement No. 6B, dated as of September 30, 2011, by and between Airbus S.A.S. and Republic Airways Holdings Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(h) |
| 10.15(i)† | Letter Agreement No. 6D, dated as of October 9, 2019, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(i) |
| 10.15(j)† | Letter Agreement No. 6D-1, dated as of October 9, 2019, by and between and Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(j) |
| 10.15(k)† | Letter Agreement No. 6D-2, dated as of October 9, 2019, by and between and Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(k) |
| 10.15(l)† | Letter Agreement No. 6D-3, dated as of October 9, 2019, by and between and Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(l) |
| 10.15(m)† | Amended and Restated Letter Agreement No. 7, dated as of December 28, 2017, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(m) |
| 10.15(n)† | Letter Agreement No. 8, dated as of September 30, 2011, by and between Airbus S.A.S. and Republic Airways Holdings Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(n) |
| 10.15(o)† | Letter Agreement No. 9, dated as of September 30, 2011, by and between Airbus S.A.S. and Republic Airways Holdings Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(o) |
| 10.15(p)† | Amended and Restated Letter Agreement No. 10, dated as of October 9, 2019, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(p) |
| 10.15(q)† | Letter Agreement No. 11, dated as of November 13, 2021, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-K | 001-40304 | 2/23/2022 | 10.17(q) |
| 10.15(r)† | Amendment No. 1 to Airbus A320 Family Aircraft Purchase Agreement, dated as of January 10, 2013, by and between Airbus S.A.S. and Republic Airways Holdings Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(q) |
|---|---|---|---|---|---|
| 10.15(s)† | Amendment No. 2 to Airbus A320 Family Aircraft Purchase Agreement, dated as of December 3, 2013, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(r) |
| 10.15(t)† | Amendment No. 3 to Airbus A320 Family Aircraft Purchase Agreement, dated as of October 31, 2014, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(s) |
| 10.15(u)† | Amendment No. 4 to Airbus A320 Family Aircraft Purchase Agreement, dated as of August 7, 2017, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(t) |
| 10.15(v)† | Amendment No. 5 to Airbus A320 Family Aircraft Purchase Agreement, dated as of December 28, 2017, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(u) |
| 10.15(w)† | Amendment No. 6 to Airbus A320 Family Aircraft Purchase Agreement, dated as of July 1, 2019, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(v) |
| 10.15(x)† | Amendment No. 7 to Airbus A320 Family Aircraft Purchase Agreement, dated as of October 9, 2019, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(w) |
| 10.15(y)† | Amendment No. 8 to Airbus A320 Family Aircraft Purchase Agreement, dated as of March 16, 2020, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(x) |
| 10.15(z)† | Amendment No. 9 to Airbus A320 Family Aircraft Purchase Agreement, dated as of May 4, 2020, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(y) |
| 10.15(aa)† | Amendment No. 10 to Airbus A320 Family Aircraft Purchase Agreement, dated as of December 2, 2020, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(z) |
| 10.15(bb)† | Amendment No. 11 to Airbus A320 Family Aircraft Purchase Agreement, dated as of November 13, 2021, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-K | 001-40304 | 2/23/2022 | 10.17(bb) |
| 10.15(cc)† | Amendment No. 12 to Airbus A320 Family Aircraft Purchase Agreement, dated as of March 31, 2022, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-K | 001-40304 | 2/22/2023 | 10.17(cc) |
| 10.15(dd)† | Amendment No. 13 to Airbus A320 Family Aircraft Purchase Agreement, dated as of December 16, 2022, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-K | 001-40304 | 2/22/2023 | 10.17(dd) |
| 10.15(ee)† | Amendment No. 14 to Airbus A320 Family Purchase Agreement, dated as of March 31, 2023, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 5/3/2023 | 10.2 |
| 10.15(ff)† | Amendment No. 15 to Airbus A320 Family Purchase Agreement, dated as of June 28, 2023, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 8/1/2023 | 10.1 |
| 10.15(gg)† | Amendment No. 16 to Airbus A320 Family Purchase Agreement, dated as of August 9, 2023, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 10/26/2023 | 10.1 |
| 10.15(hh)† | Amendment No. 17 to Airbus A320 Family Purchase Agreement, dated as of September 28, 2023, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 10/26/2023 | 10.2 | |
|---|---|---|---|---|---|---|
| 10.15(ii)† | Letter Agreement, dated as of December 28, 2017, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.16(aa) | |
| 10.15(jj)† | Amendment No. 18 to Airbus A320 Family Aircraft Purchase Agreement, dated as of July 31, 2024, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 10/29/2024 | 10.5(a) | |
| 10.15(kk)† | Amendment No. 19 to Airbus A320 Family Aircraft Purchase Agreement, dated as of September 25, 2024, by and between Airbus S.A.S. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 10/29/2024 | 10.5(b) | |
| 10.16(a)† | Airbus A321 Aircraft Purchase Agreement, dated as of October 31, 2014, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.17(a) | |
| 10.16(b)† | Letter Agreement No. 5, dated as of October 31, 2014, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.17(b) | |
| 10.16(c)† | Letter Agreement No. 6A, dated as of October 31, 2014, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.17(c) | |
| 10.16(d)† | Letter Agreement No. 6B, dated as of October 31, 2014, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.17(d) | |
| 10.16(e)† | Letter Agreement No. 8, dated as of October 31, 2014, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.17(e) | |
| 10.16(f)† | Letter Agreement No. 9, dated as of October 31, 2014, by and between Airbus S.A.S. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.17(f) | |
| 10.17(a)† | Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of September 15, 2020, by and between Frontier Airlines, Inc. and Barclays Bank Delaware, formerly known as Juniper Bank. | S-1/A | 333-254004 | 3/18/2021 | 10.18 | |
| 10.17(b)† | First Amendment to the Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of June 29, 2021, by and between Barclays Bank Delaware and Frontier Airlines, Inc. | 10-Q | 001-40304 | 8/1/2023 | 10.6 | |
| 10.17(c)† | Second Amendment to the Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of May 23, 2023, by and between Barclays Bank Delaware and Frontier Airlines, Inc. | 10-Q | 001-40304 | 8/1/2023 | 10.7 | |
| 10.17(d)† | Third Amendment to the Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of September 6, 2024, by and between Barclays Bank Delaware and Frontier Airlines, Inc. | 10-Q | 001-40304 | 10/29/2024 | 10.4(a) | |
| 10.17(e)† | Fourth Amendment to the Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of September 26, 2024, by and between Barclays Bank Delaware and Frontier Airlines, Inc. | 10-Q | 001-40304 | 10/29/2024 | 10.4(b) | |
| 10.17(f)† | Fifth Amendment to the Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of December 23, 2025, by and between Barclays Bank Delaware and Frontier Airlines, Inc. | X | ||||
| 10.18(a)† | General Terms Agreement No. 6-13616, dated as of June 30, 2000, by and between Frontier Airlines, Inc., CFM International, Inc. and Societe Nationale D’Etude et de Construction de Monteurs d’Aviation. | S-1 | 333-254004 | 3/8/2021 | 10.19(a) |
| 10.18(b)† | Letter Agreement No. 1, dated as of June 30, 2000, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(b) |
| 10.18(c)† | Letter Agreement No. 2, dated as of November 20, 2002, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(c) |
| 10.18(d)† | Letter Agreement No. 3, dated as of August 1, 2003, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(d) |
| 10.18(e)† | Letter Agreement No. 4, dated as of March 26, 2004, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(e) |
| 10.18(f)† | Letter Agreement No. 5, dated as of April 11, 2006, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(f) |
| 10.18(g) | Amendment No. 1 to GTA 6-13616, dated as of June 6, 2009, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(g) |
| 10.18(h)† | Letter Agreement No. 7, dated as of October 25, 2011, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(h) |
| 10.18(i)† | Letter Agreement No. 8, dated as of December 23, 2014, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(i) |
| 10.18(j)† | Letter Agreement No. 9, dated as of August 3, 2015, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.19(j) |
| 10.19(a)† | General Terms Agreement No. CFM-1 1-2576101711, dated as of October 17, 2011, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.20(a) |
| 10.19(b)† | Letter Agreement No. 1 to General Terms Agreement No. CFM-1 1-2576101711, dated as of October 26, 2011, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.20(b) |
| 10.19(c)† | Amendment No. 1 to Letter Agreement No. 1, dated as of December 23, 2014, by and between Frontier Airlines, Inc. and CFM International, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.20(c) |
| 10.20† | Purchase Terms Agreement (Material-Single Event), dated as of November 5, 2014, by and between Frontier Airlines, Inc. and Lufthansa Technik AG. | S-1 | 333-254004 | 3/8/2021 | 10.21 |
| 10.21(a)† | Navitaire Hosted Services Agreement, dated as of June 20, 2014, by and between Frontier Airlines, Inc. and Navitaire LLC. | S-1 | 333-254004 | 3/8/2021 | 10.22(a) |
| 10.21(b)† | Amendment No. 1 to Navitaire Hosted Services Agreement, dated as of March 1, 2015, by and between Frontier Airlines, Inc. and Navitaire LLC. | S-1 | 333-254004 | 3/8/2021 | 10.22(b) |
| 10.21(c)† | Amendment No. 2 to Navitaire Hosted Services Agreement, dated as of April 10, 2015, by and between Frontier Airlines, Inc. and Navitaire LLC. | S-1 | 333-254004 | 3/8/2021 | 10.22(c) |
| 10.21(d)† | Amendment No. 3 to Navitaire Hosted Services Agreement, dated as of January 1, 2016, by and between Frontier Airlines, Inc. and Navitaire LLC. | S-1 | 333-254004 | 3/8/2021 | 10.22(d) | |
|---|---|---|---|---|---|---|
| 10.22(a)† | Tenth Amended and Restated Credit Agreement, dated as of September 26, 2024, by and among Vertical Horizons, Ltd., as borrower, each lender identified on Schedule I thereto, and Bank of Utah, not in its individual capacity but solely as security trustee. | 10-Q | 001-40304 | 10/29/2024 | 10.2(a) | |
| 10.22(b)† | Amended and Restated Step-In Agreement, dated as of September 26, 2024, by and among Vertical Horizons, Ltd., as buyer, Bank of Utah, not in its individual capacity but solely as security trustee, and Airbus S.A.S. | 10-Q | 001-40304 | 10/29/2024 | 10.2(b) | |
| 10.22(c)† | Eleventh Amended and Restated Credit Agreement, dated as of December 24, 2025, by and among Vertical Horizons, Ltd., as borrower, each lender identified on Schedule I thereto, and Bank of Utah, not in its individual capacity but solely as security trustee. | X | ||||
| 10.22(d)† | Amended and Restated Step-In Agreement, dated as of December 24, 2025, by and among Vertical Horizons, Ltd., as buyer, Bank of Utah, not in its individual capacity but solely as security trustee, and Airbus S.A.S. | X | ||||
| 10.23(a)† | Credit Agreement, dated as of September 26, 2024, by and among Vertical Horizons JSA Limited, as borrower, JSA International U.S. Holdings, LLC, as lender and administrative agent, and Bank of Utah, not in its individual capacity but solely as security trustee. | 10-Q | 001-40304 | 10/29/2024 | 10.1(a) | |
| 10.23(b)† | Step-In Agreement, dated as of September 26, 2024, by and between Frontier Group Holdings, Inc., as guarantor, Frontier Airlines, Inc., as original buyer, Vertical Horizons JSA Limited, as buyer, JSA International U.S. Holdings, LLC, as financier, and Airbus S.A.S. | 10-Q | 001-40304 | 10/29/2024 | 10.1(b) | |
| 10.24(a)† | Revolving Loan and Guaranty Agreement, dated as of September 26, 2024, by and among Frontier Brand Intellectual Property, Ltd. and Frontier Loyalty Programs, Ltd., as borrowers, Frontier Airlines, Inc., Frontier Group Holdings, Inc., Frontier Airlines Holdings, Inc., Frontier Finance 1, Ltd., Frontier Finance 2, Ltd. and the other guarantors from time to time party thereto, as guarantors, Citibank N.A., as administrative agent and collateral agent, and the lenders party thereto. | 10-Q | 001-40304 | 10/29/2024 | 10.3 | |
| 10.24(b)† | Omnibus Amendment No. 1 to Revolving Loan and Guaranty Agreement, dated as of December 27, 2024, by and among Frontier Brand Intellectual Property, Ltd. and Frontier Loyalty Programs, Ltd., as borrowers, Frontier Airlines, Inc., Frontier Airlines Holdings, Inc., Frontier Group Holdings, Inc., Frontier Finance 1, Ltd., and Frontier Finance 2, Ltd., as guarantors, the lenders party thereto, and Citibank, N.A., as administrative and collateral agent, depository and securities intermediary. | 10-K | 001-40304 | 2/18/2025 | 10.24(b) | |
| 10.24(c)† · Amendment No. 2 to Revolving Loan and Guaranty Agreement, dated as of July 30, 2025, among Frontier Brand Intellectual Property, Ltd. and Frontier Loyalty Programs, Ltd., as borrowers, Frontier Airlines, Inc., Frontier Airlines Holdings, Inc., Frontier Group Holdings, Inc., Frontier Finance 1, Ltd. and Frontier Finance 2, Ltd., as guarantors, the lenders party thereto, and Citibank, N.A., as administrative agent, collateral agent depository and securities intermediary · X | ||||||
|---|---|---|---|---|---|---|
| 10.24(d)† · Increase Joinder to Revolving Loan and Guaranty Agreement, dated as of December 16, 2025, by and among Frontier Brand Intellectual Property, Ltd. and Frontier Loyalty Programs, Ltd., as borrowers, Frontier Airlines, Inc., Frontier Airlines Holdings, Inc., Frontier Group Holdings, Inc., Frontier Finance 1, Ltd., and Frontier Finance 2, Ltd., as guarantors, the lenders party thereto, and Citibank, N.A., as administrative agent and collateral agent. · X | ||||||
| 10.25† | Master Services Agreement, dated April 26, 2023, by and among Frontier Airlines Holdings, Inc., on behalf of itself and Frontier Airlines, Inc., U.S. Bank National Association, acting through its Canadian branch, Elavon Company Canada, and Elavon Inc. | 10-Q | 001-40304 | 8/1/2023 | 10.5 | |
| 10.25(a)† | Amendment No. 1 to Master Services Agreement, dated December 29, 2025, by and among Frontier Airlines Holdings, Inc., on behalf of itself and Frontier Airlines, Inc., U.S. Bank National Association, acting through its Canadian branch, Elavon Company Canada, and Elavon Inc. | X | ||||
| 10.26(a)† | Rate per Flight Hour Agreement, dated as of August 29, 2017, by and between CFM International, Inc. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.31(a) | |
| 10.26(b)† | Amendment No. 1 to Rate per Flight Hour Agreement, dated as of August 29, 2017, by and between CFM International, Inc. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.31(b) | |
| 10.26(c)† | Amendment No. 1 to Rate per Flight Hour Agreement, dated as of September 12, 2025, by and between CFM International Inc. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 11/5/2025 | 10.2(a) | |
| 10.26(d)† | Amendment No. 4 to Rate per Flight Hour Agreement, dated as of September 12, 2025, by and between CFM International Inc. and Frontier Airlines, Inc. | 10-Q | 001-40304 | 11/5/2025 | 10.2(b) | |
| 10.27(a)† | Codeshare Agreement, dated as of January 16, 2018, by and between Concesionaria Vuela Compania Aviacion S.A.P.I. de C.V. and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.32 | |
| 10.27(b)† | Amendment No. One to Codeshare Agreement, dated as of May 22, 2018, by and between Frontier Airlines, Inc. and Concesionaria Vuela Compania Aviacion S.A.P.I. de C.V. | 10-Q | 001-40304 | 8/8/2024 | 10.1 | |
| 10.27(c) | Amendment No. Two to Codeshare Agreement, dated as of February 14, 2019, by and between Frontier Airlines, Inc. and Concesionaria Vuela Compania Aviacion S.A.P.I. de C.V. | 10-Q | 001-40304 | 8/8/2024 | 10.2 | |
| 10.27(d) | Amendment No. Three to Codeshare Agreement, dated as of April 12, 2024, by and between Frontier Airlines, Inc. and Concesionaria Vuela Compania Aviacion S.A.P.I. de C.V. | 10-Q | 001-40304 | 8/8/2024 | 10.3 | |
| 10.27(e)† | Amendment No. Four to Codeshare Agreement, dated as of November 4, 2024, by and between Frontier Airlines, Inc. and Concesionaria Vuela Compania Aviacion S.A.P.I. de C.V. | 10-K | 001-12805 | 2/18/2025 | 10.27(e)† | |
| 10.27(f)† | Amendment No. Five to Codeshare Agreement, dated as of November 12 2025, by and between Frontier Airlines, Inc. and Concesionaria Vuela Compania Aviacion S.A.P.I. de C.V. | X | ||||
| 10.28 | Promissory Note, dated as of April 30, 2020, issued by Frontier Group Holdings, Inc. in the name of the United States Department of the Treasury and guaranteed by Frontier Airlines, Inc. and Frontier Airlines Holdings, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.33 | |
| 10.29 | Payroll Support Program Agreement, dated as of April 30, 2020, between Frontier Airlines, Inc. and the United States Department of the Treasury. | S-1 | 333-254004 | 3/8/2021 | 10.34 | |
| 10.30† | Loan and Guarantee Agreement, dated as of September 28, 2020, by and among Frontier Airlines, Inc., Frontier Group Holdings, Inc., the United States Department of the Treasury and The Bank of New York Mellon, as administrative and collateral agent. | S-1 | 333-254004 | 3/8/2021 | 10.37 | |
| 10.31 | Letter Agreement, dated as of January 15, 2021, among Frontier Airlines, Inc., Frontier Group Holdings, Inc. and the United States Department of the Treasury and acknowledged by The Bank of New York Mellon, as administrative and collateral agent. | S-1 | 333-254004 | 3/8/2021 | 10.40 | |
| 10.32 | Payroll Support Program Extension Agreement, dated as of January 15, 2021, between Frontier Airlines, Inc. and the United States Department of the Treasury. | S-1 | 333-254004 | 3/8/2021 | 10.41 | |
| 10.33 | Promissory Note, dated as of January 15, 2021, issued by Frontier Group Holdings, Inc. in the name of the United States Department of the Treasury and guaranteed by Frontier Airlines, Inc. and Frontier Airlines Holdings, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.42 | |
| 10.34 | Payroll Support Program Agreement, dated as of April 29, 2021, between Frontier Airlines, Inc. and the United States Department of the Treasury. | 10-Q | 001-40304 | 5/13/2021 | 10.8 | |
| 10.35 | Promissory Note, dated as of April 29, 2021, issued by Frontier Group Holdings, Inc. in the name of the United States Department of the Treasury and guaranteed by Frontier Airlines, Inc. and Frontier Airlines Holdings, Inc. | 10-Q | 001-40304 | 5/13/2021 | 10.9 | |
| 10.36(a)† | PW1100G-JM Engine Purchase and Support Agreement, dated as of April 13, 2020, by and between International Aero Engines, LLC and Frontier Airlines, Inc. | S-1 | 333-254004 | 3/8/2021 | 10.46 | |
| 10.36(b)† | Amendment No. 1 to PW1100G-JM Engine Purchase and Support Agreement, dated as of April 18, 2022, by and between International Aero Engines, LLC and Frontier Airlines, Inc. | 10-Q | 001-40304 | 7/27/2022 | 10.9 | |
| 10.36(c)† | PW1100G-JM Engine Purchase and Support Agreement and Fleet Management Program, dated as of July 24, 2025, by and between International Aero Engines, LLC and Frontier Airlines, Inc. | 10-Q | 001-40304 | 11/5/2025 | 10.1(a) | |
| 10.36(d)† | Amendment No. 2, dated as of July 24, 2025, to PW1100G-JM Engine Purchase and Support Agreement by and between International Aero Engines, LLC and Frontier Airlines, Inc. | 10-Q | 001-40304 | 11/5/2025 | 10.1(b) | |
| 10.36(e)† | PW1100G-JM Spare Engine and Engine Thrust Intermix Agreement, dated as of July 24, 2025, by and between International Aero Engines, LLC and Frontier Airlines, Inc. | 10-Q | 001-40304 | 11/5/2025 | 10.1(c) | |
| 10.37† | Indenture dated as of November 4, 2025, by and between Wilmington Trust, National Association and Frontier Airlines, Inc. | X | ||||
| 19.1 | Insider Trading Compliance Policy and Procedures | 10-K | 001-40304 | 2/20/2024 | 19.1 | |
| 21.1 | List of subsidiaries. | X | ||||
| 23.1 | Consent of Ernst & Young LLP, independent registered public accounting firm. | X | ||||
| 24.1 | Power of Attorney (included in the signature pages hereto). | X | ||||
| 31.1 | Certification of the Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | X | ||||
| 31.2 | Certification of the Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. | X | ||||
| 32.1* | Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. | X | ||||
| 32.2* | Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. | X | ||||
| 97.1 | Policy for Recovery of Erroneously Awarded Compensation of Frontier Group Holdings, Inc., dated as of October 2, 2023. | 10-K | 001-40304 | 2/20/2024 | 97.1 | |
| 101.INS | Inline XBRL Instance Document - The instance document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL document. | X | ||||
| 101.SCH | Inline XBRL Taxonomy Extension Schema Document. | X | ||||
| 101.CAL | Inline XBRL Taxonomy Extension Calculation Linkbase Document. | X | ||||
| 101.DEF | Inline XBRL Taxonomy Extension Definition Linkbase Document. | X | ||||
| 101.LAB | Inline XBRL Taxonomy Extension Label Linkbase Document. | X | ||||
| 101.PRE | Inline XBRL Taxonomy Extension Presentation Linkbase Document. | X | ||||
| 104 | Cover Page Interactive Data File (Embedded within the Inline XBRL document and included in Exhibit 101). | X | ||||
- The certifications furnished in Exhibits 32.1 and 32.2 here to are deemed to accompany this Annual Report on Form 10-K and are not deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, nor shall they be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act, irrespective of any general incorporation language contained in such filing.
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.