NOTES TO CONSOLIDATED FINANCIAL STATEMENTS OF AMERICAN AIRLINES GROUP INC. Maturities of lease liabilities were as follows (in millions): As of December 31, 2018, we have 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. Operating lease rent expense, excluding landing fees, was approximately $3.2 billion in each of 2017 and 2016, which includes the lease of certain aircraft under capacity purchase agreements. As of December 31, 2017, future minimum lease payment obligations under noncancellable operating leases, including payments for the lease of certain aircraft under capacity purchase agreements, as well as payments under capital lease obligations were as follows (in millions): Disclosures related to periods prior to adoption of the New Lease Standard December 31, 2017 Operating Leases Capital Leases 2018 $ 2,572 $ 126 2019 2,329 123 2020 2,104 120 2021 1,621 118 2022 1,398 122 2023 and thereafter 3,965 387 Total lease payments $ 13,989 996 Less: Imputed interest (225) Total lease obligations 771 Less: Current obligations (78) Long-term lease obligations $ 693 106 December 31, 2018 Operating Leases Finance Leases 2019 $ 1,912 $ 124 2020 1,838 120 2021 1,636 118 2022 1,438 122 2023 1,255 105 2024 and thereafter 3,620 282 Total lease payments 11,699 871 Less: Imputed interest (2,143) (177) Total lease obligations 9,556 694 Less: Current obligations (1,654) (81) Long-term lease obligations $ 7,902 $ 613