U.S. air travel fell significantly in 2020 because of reduced travel in response to the worldwide COVID-19 pandemic. In its Annual Energy Outlook 2021 (AEO2021) Reference case, the U.S. Energy Information Administration (EIA) projects total U.S. passenger air travel demand will return to 2019 levels by 2025, but passenger travel jet fuel consumption will not return to 2019 levels until nearly 2030. Increasing air travel efficiency means that increasing air travel does not necessarily result in similar changes in jet fuel consumption.