Subsequent Events	9 Months Ended
Sep. 30, 2025
Subsequent Events [Abstract]
Subsequent Events	15. Subsequent Events Reverse Stock Split Mesa authorized a 15-for-1 Reverse Stock Split of issued and outstanding common stock. The Reverse Stock Split is expected to occur on or about 5:00 p.m. Eastern Time on November 24, 2025, with the common stock trading on a post-split basis under the Company's expected new Nasdaq trading symbol, "RJET," at the market open on November 25, 2025. Amendment to Loan and Guarantee Agreement On October 24, 2025, the Company entered into an Amendment (the "Amendment") to its Loan and Guarantee Agreement, dated as of October 30, 2020 (as theretofore amended, the “Loan Agreement”), among Mesa, Mesa Airlines, the Guarantors party thereto from time to time, Jefferies Capital Services, LLC (as successor in interest to the United States Department of the Treasury) (the “Lender” or “Jefferies”), and The Bank of New York Mellon as Administrative Agent and Collateral Agent (the “Agents”) (collectively, the “Parties”). Capitalized terms used but not defined herein have the meanings ascribed to them in the Loan Agreement. Under the terms of the Amendment, Jefferies agreed to: (a) extend the Maturity Date of the Loan Agreement from October 30, 2025 to November 28, 2025, subject to the Company’s further right to extend the Maturity Date by 30 days by providing notice to the Administrative Agent to no later than November 27, 2025; (b) reduce the interest rate under the Loan Agreement to zero percent (0%) for a period of 90 days from the date of the Amendment; (c) waive the restrictions on Fundamental Changes and Organizational Document amendments in connection with the Merger; (d) waive the Collateral Coverage Ratio through the Maturity Date, and (e) subject to the payment in full of the obligations under the Loan Agreement on the Maturity Date, reduce the principal amount of the Obligations under the Loan Agreement by $12.3 million (collectively, the “Amendments”). In connection with the execution of the Amendment, (i) Mesa Airlines entered into a Security and Control Agreement with Jefferies pursuant to which Mesa Airlines deposited $31.9 million into a collateral account controlled by Jefferies and agreed to pledge an aircraft engine, each as collateral for the obligations under the Loan Agreement, and (ii) Mesa Airlines agreed to pay Jefferies a non-refundable advisory fee of $3.5 million, payable on the earlier of the approval of the Merger and the Maturity Date. Held for Sale Assets Subsequent to September 30, 2025, the following events occurred related to held for sale assets: • The Company closed the sale of nine CRJ-900 airframes and ten GE Model CF34-8C engines to third parties for gross proceeds of $15.0 million, $12.1 million of which was used to pay down our UST Loan. • The sale of eight GE Model CF34-8C engines previously expected to be sold to a third party for $6.2 million did not close. The Company has entered into agreements with other buyers for all eight engines and expects to receive slightly less proceeds than the original amount that the engines were expected to sell for. • The Company entered into an agreement with a third party for the sale of all remaining CRJ spare parts as well as six of the eight engines mentioned above that did not close. The Company expects to receive a minimum of $7.0 million and up to $13.2 million in proceeds for the sale of such assets. o The Company recorded an impairment loss of approximately $7.1 million associated with held for sale accounting treatment of the spare parts and engines, which will be reflected in our financial statements for the fourth fiscal quarter of 2025.

Subsequent Events

9 Months Ended

Sep. 30, 2025

15.

Subsequent Events

Reverse Stock Split

Mesa authorized a 15-for-1 Reverse Stock Split of issued and outstanding common stock. The Reverse Stock Split is expected to occur on or about 5:00 p.m. Eastern Time on November 24, 2025, with the common stock trading on a post-split basis under the Company's expected new Nasdaq trading symbol, "RJET," at the market open on November 25, 2025.

Amendment to Loan and Guarantee Agreement

On October 24, 2025, the Company entered into an Amendment (the "Amendment") to its Loan and Guarantee Agreement, dated as of October 30, 2020 (as theretofore amended, the “Loan Agreement”), among Mesa, Mesa Airlines, the Guarantors party thereto from time to time, Jefferies Capital Services, LLC (as successor in interest to the United States Department of the Treasury) (the “Lender” or “Jefferies”), and The Bank of New York Mellon as Administrative Agent and Collateral Agent (the “Agents”) (collectively, the “Parties”). Capitalized terms used but not defined herein have the meanings ascribed to them in the Loan Agreement.

Under the terms of the Amendment, Jefferies agreed to: (a) extend the Maturity Date of the Loan Agreement from October 30, 2025 to November 28, 2025, subject to the Company’s further right to extend the Maturity Date by 30 days by providing notice to the Administrative Agent to no later than November 27, 2025; (b) reduce the interest rate under the Loan Agreement to zero percent (0%) for a period of 90 days from the date of the Amendment; (c) waive the restrictions on Fundamental Changes and Organizational Document amendments in connection with the Merger; (d) waive the Collateral Coverage Ratio through the Maturity Date, and (e) subject to the payment in full of the obligations under the Loan Agreement on the Maturity Date, reduce the principal amount of the Obligations under the Loan Agreement by $12.3 million (collectively, the “Amendments”).

In connection with the execution of the Amendment, (i) Mesa Airlines entered into a Security and Control Agreement with Jefferies pursuant to which Mesa Airlines deposited $31.9 million into a collateral account controlled by Jefferies and agreed to pledge an aircraft engine, each as collateral for the obligations under the Loan Agreement, and (ii) Mesa Airlines agreed to pay Jefferies a non-refundable advisory fee of $3.5 million, payable on the earlier of the approval of the Merger and the Maturity Date.

Held for Sale Assets

Subsequent to September 30, 2025, the following events occurred related to held for sale assets:

•

The Company closed the sale of nine CRJ-900 airframes and ten GE Model CF34-8C engines to third parties for gross proceeds of $15.0 million, $12.1 million of which was used to pay down our UST Loan.

•

The sale of eight GE Model CF34-8C engines previously expected to be sold to a third party for $6.2 million did not close. The Company has entered into agreements with other buyers for all eight engines and expects to receive slightly less proceeds than the original amount that the engines were expected to sell for.

•

The Company entered into an agreement with a third party for the sale of all remaining CRJ spare parts as well as six of the eight engines mentioned above that did not close. The Company expects to receive a minimum of $7.0 million and up to $13.2 million in proceeds for the sale of such assets.

The Company recorded an impairment loss of approximately $7.1 million associated with held for sale accounting treatment of the spare parts and engines, which will be reflected in our financial statements for the fourth fiscal quarter of 2025.