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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Contractual Purchase Commitments
As of March 31, 2021, based on the Supplement to its aircraft purchase agreement with Boeing, the Company had firm deliveries and options for Boeing 737 MAX 7 and 737 MAX 8 aircraft as follows:

The Boeing Company
MAX 7
Firm Orders
MAX 8
Firm Orders
MAX 7 or 8 OptionsAdditional MAX 8sTotal
2021— 19 — 28 (a)
202230 — 42 — 72 
202330 — 38 — 68 
202430 — 40 — 70 
202530 — 40 — 70 
202615 15 40 — 70 
202715 15 30 — 60 
202815 15 30 — 60 
202920 30 10 — 60 
203015 45 — — 60 
2031— 10 — — 10 
200149(b)2709(c)628
(a) Includes 20 737 MAX 8s delivered as of March 31, 2021, consisting of 12 owned and 8 leased aircraft.
(b) The Company has flexibility to designate firm orders or options as MAX 7 or MAX 8, upon written advance notification as stated in the contract.
(c) These 9 additional MAX 8 aircraft are leases to be acquired from various third parties, including 8 leased MAX 8 aircraft delivered in first quarter 2021. The Company also received 7 leased MAX 8 aircraft in fourth quarter 2020, for a total of 16 MAX 8 operating leased aircraft from third parties in 2020 and 2021, combined.