The Transportation Security Administration (TSA) is extending the face mask requirement for individuals across all transportation networks throughout the United States, including at airports, onboard commercial aircraft, on over-the-road buses and on commuter bus and rail systems through January 18, 2022.
Read more here: https://www.tsa.gov/news/press/releases/2021/08/20/tsa-extends-face-mask-requirement-through-january-18-2022