![Daily Air Travelers in the United States, 2019-2022 | The Geography of Transport Systems](https://i0.wp.com/transportgeography.org/wp-content/uploads/daily_air_travel_usa2.png?resize=900%2C422&ssl=1)
Daily air travelers crossing through TSA checkpoints are almost back to pre-pandemic levels. 2021 marked the beginning of the recovery as vaccines became widely available and restrictions for domestic flights were relaxed (e.g Covid testing before boarding).