NOTES TO CONSOLIDATED FINANCIAL STATEMENTS OF AMERICAN AIRLINES, INC. Supplemental cash flow and other information related to leases was as follows (in millions): Year Ended December 31, 2018 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 1,914 Operating cash flows from finance leases 48 Financing cash flows from finance leases 78 ROU assets obtained in exchange for lease liabilities: Operating leases 1,258 Gain on sale leaseback transactions, net 59 December 31, 2018 Operating Leases Finance Leases 2019 $ 1,894 $ 124 2020 1,824 120 2021 1,625 118 2022 1,428 122 2023 1,250 105 2024 and thereafter 3,611 282 Total lease payments 11,632 871 Less: Imputed interest (2,136) (177) Total lease obligations 9,496 694 Less: Current obligations (1,639) (81) Long-term lease obligations $ 7,857 $ 613 As of December 31, 2018, American has additional operating lease commitments that have not yet commenced of approximately $1.9 billion for 22 787-8 aircraft to be delivered in 2020 and 2021 with lease terms of 10 years. Maturities of lease liabilities were as follows (in millions): 152