LONG-TERM DEBT - SCHEDULE OF LONG-TERM DEBT (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	Oct. 15, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Debt Instrument [Line Items]
Debt Issuance Costs, Net		$ (13)		$ (13)		$ (15)
Total		4,625		4,625		2,471
Less current portion		(515)		(515)		(289)
Long-Term Debt, Net of Current Portion		$ 4,159		$ 4,159		$ 2,182
Debt, Weighted Average Interest Rate		6.20%		6.20%
Weighted-average fixed-interest rate		6.00%		6.00%		3.40%
Weighted-average variable-interest rate		7.00%		7.00%		6.80%
Long-term debt payments				$ 279	$ 242
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 39.06		$ 39.06
Proceeds from issuance of debt				$ 344	$ 313
Proceeds from Issuance of Long-term Debt				$ 415
Adjustments to Additional Paid in Capital, Warrant Issued			$ 13
Proceeds from Secured Notes Payable	$ 625
Debt, Weighted Average Interest Rate		6.20%		6.20%
Proceeds from Issuance of Long-term Debt				$ 415
Subsequent Event [Member]
Debt Instrument [Line Items]
Payment for Debt Extinguishment or Debt Prepayment Cost	436
Scheduled Debt Payments [Member]
Debt Instrument [Line Items]
Long-term debt payments				279
Scheduled Debt Payments made by Hawaiian
Debt Instrument [Line Items]
Long-term debt payments				19
Floating Interest Rate
Debt Instrument [Line Items]
Payment for Debt Extinguishment or Debt Prepayment Cost	110
US Treasury CARES Act Loan [Member]
Debt Instrument [Line Items]
Adjustments to Additional Paid in Capital, Warrant Issued				30
Proceeds from Issuance of Long-Term Debt, Cash proceeds [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt		$ 347
Proceeds from Issuance of Long-term Debt		347
Proceeds from Issuance of Long-Term Debt, Noncash proceeds [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt				68
Proceeds from Issuance of Long-term Debt				68
fixed-rate notes payable due through 2032
Debt Instrument [Line Items]
Total		271		271		$ 80
Fixed-rate PSP notes payable due through 2031
Debt Instrument [Line Items]
Total		712		712		600
Fixed-rate EETC's payable due through 2027
Debt Instrument [Line Items]
Total		867		867		835
Fixed-rate Japanese Yen payable due through 2031
Debt Instrument [Line Items]
Total		106		106		0
Fixed-rate Hawaiian Loyalty Program due through 2029
Debt Instrument [Line Items]
Total		991		991		0
Variable-rate notes payable due through 2036
Debt Instrument [Line Items]
Total		1,691		1,691		971
Excluding finance leases [Member]
Debt Instrument [Line Items]
Long-Term Debt, Net of Current Portion		4,110		4,110		$ 2,182
Variable Rate debt with interest rate swap [Member] | Interest rate swaps agreements [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount		210		210
Derivative, Notional Amount		$ 210		$ 210
Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 750