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Business Combinations, Share Conversion Rate

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Capacity Purchase Agreement, Term

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Merger, Funding From Third Party

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Merger, Proceeds From Assets Sales

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Start-Up Costs Received By Third Party

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Percentage of voting equity interest acquired in business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Face amount or stated value per share of common stock.

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Amount of increase (decrease) from measurement period adjustment of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Name:	dei_LegalEntityAxis=rjet_UnitedAirlinesMember
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Data Type:	na
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MERGER WITH MESA AIR GROUP, INC. - Narrative (Details) $ / shares in Units, $ in Millions			9 Months Ended
	Nov. 25, 2025 USD ($) director aircraft $ / shares shares	Nov. 24, 2025	Sep. 30, 2026 USD ($) $ / shares 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
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
Conversion ratio		0.0667
Consideration transferred	$ 120.2
Goodwill adjustment			$ (10.8)
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]
Number of director designated \| director	1
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%