Proof of negative COVID-19 test required for US arrivals from international travel This week travelers will face new requirements when returning to the United States from foreign countries. and last updated 2021-01-29 12:44:06-05 TAMPA, Fla. â This week travelers will face new requirements when returning to the United States from foreign countries. They must now take a COVID19 test within three days of their flight and present a negative result or documentation of recovery to the airline before boarding their flight. The CDC also says travelers should quarantine when they return. âItâs very effective,â said Edwin Michael, Ph.D.