A face covering is required by U.S. federal law at the airport and on board American Airlines Reservations. In addition, passengers flying to the U.S. from another country,... moreA face covering is required by U.S. federal law at the airport and on board American Airlines Reservations. In addition, passengers flying to the U.S. from another country, including U.S. citizens, must show proof of a negative COVID-19 test taken within 3 days of departure, or documentation of recovery. These rules do not apply to children under 2.