On Jan. 12, 2021, The Center of Disease Control and Prevention (CDC) announced that all air passengers entering the United States are required to provide a negative COVID-19 test before boarding their flight. The new rule will go into effect Jan. 26.
The Centers for Disease Control and Prevention press release
https://www.cdc.gov/media/releases/2021/s0112-negative-covid-19-air-passengers.html
All air passengers are required to get a viral test within the 3 days before their flight to the U.S. (including Hawaii) departs, and provide documentation of their laboratory test result (paper or electronic copy) at the airline check-in counter. If a passenger does not provide documentation of a negative test, or chooses not to take a test, the airline must deny boarding to the passenger.
*For entry into Hawai’i, please check here for the latest information and procedures.