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MERGER WITH MESA AIR GROUP, INC. - Narrative (Details) $ / shares in Units, $ in Millions |  | 1 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 25, 2025 USD ($) aircraft director $ / shares shares | Feb. 09, 2026 USD ($) shares | Mar. 31, 2026 $ / shares | Dec. 31, 2025 $ / shares
Business Combination [Line Items] |  |  |  |
Common stock, par value (in dollars per share) | $ / shares |  |  | $ 0.001 | $ 0.001
Equity participation right | $ (2.3) |  |  |
Republic Airways Holdings Inc. |  |  |  |
Business Combination [Line Items] |  |  |  |
Number of director designated | director | 7 |  |  |
Purchase agreement term | 10 years |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |
Share conversion rate | 38.9933 |  |  |
Equity interest acquired, percent | 88.00% |  |  |
Merger related costs | $ 19.6 |  |  |
Proceeds from asset sales | 8.4 |  |  |
Escrow shares (in shares) | shares |  | 109,106 |  |
Consideration transferred | $ 120.2 |  |  |
Republic Airways Holdings Inc. | E175 |  |  |  |
Business Combination [Line Items] |  |  |  |
Number of aircraft operated | aircraft | 60 |  |  |
Republic Airways Holdings Inc. | United Airlines |  |  |  |
Business Combination [Line Items] |  |  |  |
Purchase agreement term | 10 years |  |  |
Merger funding | $ 23.6 |  |  |
Escrow shares (in shares) | shares |  | 2,744,348 |  |
Start-up costs received by third party | $ 49.0 |  |  |
Republic Airways Holdings Inc. | Legacy Republic |  |  |  |
Business Combination [Line Items] |  |  |  |
Number of director designated | director | 6 |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |
Equity interest acquired, percent | 88.10% |  |  |
Percentage of voting interest relinquished | 11.90% |  |  |
Republic Airways Holdings Inc. | Mesa Air Group, Inc. |  |  |  |
Business Combination [Line Items] |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |
Equity interest acquired, percent | 6.00% |  |  |
Escrow shares held, percent | 6.00% |  |  |
Shares issued (in shares) | shares | 2,853,454 |  |  |
Republic Airways Holdings Inc. | Mesa Air Group, Inc. | United Airlines |  |  |  |
Business Combination [Line Items] |  |  |  |
Adjusted net debt settlement |  | $ 51.7 |  |
Republic Airways Holdings Inc. | United Airlines |  |  |  |
Business Combination [Line Items] |  |  |  |
Equity interest acquired, percent | 5.90% |  |  |

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