Travel Travelers boarding international flights to the US will need proof of negative COVID-19 test, CDC says January 12, 2021January 12, 2021Dawn Gilbertson and Jayme Deerwester, USA TODAYComments Off on Travelers boarding international flights to the US will need proof of negative COVID-19 test, CDC says Starting Jan. 26, the CDC will require universal COVID testing for all passengers on international flights to the U.S.