Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Schedule of Future Minimum Lease Payments for Finance Leases

The following table provides details of the Company's future minimum lease payments under finance lease liabilities and operating lease liabilities recorded on the Company's consolidated balance sheets as of December 31, 2023. The table does not include commitments that are contingent on events or other factors that are currently uncertain and unknown.

	Finance Leases		Operating Leases						Total Operating and Finance Lease Obligations
			Aircraft and Spare Engine Leases		Property Facility Leases		Other
	(in thousands)
2024	$	251	$	446,331	$	6,623	$	177	$	453,382
2025	154		430,843		4,143		—		435,140
2026	76		404,529		3,994		—		408,599
2027	27		388,569		3,166		—		391,762
2028	1		367,803		1,754		—		369,558
2029 and thereafter	—		3,539,416		143,340		—		3,682,756
Total minimum lease payments	$	509	$	5,577,491	$	163,020	$	177	$	5,741,197
Less amount representing interest	29		2,083,159		133,791		2		2,216,981
Present value of minimum lease payments	$	480	$	3,494,332	$	29,229	$	175	$	3,524,216
Less current portion	236		219,852		4,838		175		225,101
Long-term portion	$	244	$	3,274,480	$	24,391	$	—	$	3,299,115

Schedule of Future Minimum Lease Payments for Operating Leases

The following table provides details of the Company's future minimum lease payments under finance lease liabilities and operating lease liabilities recorded on the Company's consolidated balance sheets as of December 31, 2023. The table does not include commitments that are contingent on events or other factors that are currently uncertain and unknown.

	Finance Leases		Operating Leases						Total Operating and Finance Lease Obligations
			Aircraft and Spare Engine Leases		Property Facility Leases		Other
	(in thousands)
2024	$	251	$	446,331	$	6,623	$	177	$	453,382
2025	154		430,843		4,143		—		435,140
2026	76		404,529		3,994		—		408,599
2027	27		388,569		3,166		—		391,762
2028	1		367,803		1,754		—		369,558
2029 and thereafter	—		3,539,416		143,340		—		3,682,756
Total minimum lease payments	$	509	$	5,577,491	$	163,020	$	177	$	5,741,197
Less amount representing interest	29		2,083,159		133,791		2		2,216,981
Present value of minimum lease payments	$	480	$	3,494,332	$	29,229	$	175	$	3,524,216
Less current portion	236		219,852		4,838		175		225,101
Long-term portion	$	244	$	3,274,480	$	24,391	$	—	$	3,299,115

Schedule of Lease Costs, Lease Terms and Discount Rates

The table below presents information for lease costs related to the Company's finance and operating leases:

	Year Ended December 31,
	2023		2022
	(in thousands)
Finance lease cost
Amortization of leased assets	$	451	$	751
Interest of lease liabilities	30		57
Operating lease cost
Operating lease cost (1)	377,505		225,112
Short-term lease cost (1)	39,916		41,696
Variable lease cost (1)	227,030		200,965
Total lease cost	$	644,932	$	468,581

(1) Expenses are classified within aircraft rent and landing fees and other rents on the Company's consolidated statements of operations.

The table below presents lease-related terms and discount rates as of December 31, 2023:

	December 31, 2023		December 31, 2022
Weighted-average remaining lease term
Operating leases	14.8 years		14.6 years
Finance leases	2.3 years		2.1 years
Weighted-average discount rate
Operating leases	6.84	%	6.29	%
Finance leases	4.25	%	4.21	%