Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Firm Commitments and Options to Purchase Aircraft and Summary of Commitments

As of September 30, 2021, United had firm commitments and options to purchase aircraft from The Boeing Company ("Boeing") and Airbus S.A.S. ("Airbus") as presented in the table below:

		Scheduled Aircraft Deliveries
Aircraft Type	Number of Firm  Commitments (a)	Last Three Months of 2021	2022	2023	After 2023
Airbus A321XLR	50	—	—	—	50
Airbus A321neo	70	—	—	16	54
Airbus A350	45	—	—	—	45
Boeing 737 MAX	371	4	48	114	205
Boeing 787	8	1	7	—	—
(a) United also has options and purchase rights for additional aircraft.

Summary of Commitments

The table below summarizes United's commitments as of September 30, 2021, which include aircraft and related spare engines, aircraft improvements and all non-aircraft capital commitments (in billions):

Last three months of 2021	$	0.9
2022	5.3
2023	7.0
2024	4.8
2025	4.3
After 2025	12.2
	$	34.5

Based on these assumptions as of September 30, 2021, our estimated future payments through the end of the terms of our CPAs are presented in the table below (in billions):

Last three months of 2021	$	0.6
2022	2.1
2023	2.0
2024	1.9
2025	1.6
After 2025	5.5
	$	13.7