As of 26 January 2021, all travelers, including US citizens arriving into the United States from a foreign country will be required to get tested no more than three days prior to their flight departure and to provide proof of the negative result or documentation of having recovered from COVID-19 to the carrier before boarding the flight.
Anyone who is currently abroad or has plans to go abroad and return on/after 26 January 2021 as well as international travelers who are due to enter the United States must comply with the newly implemented regulations.
Air carriers will be responsible for verifying the required documentation. If any passengers decide not to test or provide test results, “the airline must deny boarding”, according to the Centers for Disease Control and Prevention (CDC).
It is also advised by the CDC to get tested again three to five days after arriving into the U.S. and quarantining at the address in which travelers are staying for seven days post-travel.