I’ve been using eMed, a telemedicine service utilizing the Abbott BINAXNow COVID-19 rapid antigen test kit (which is NOT a molecular NAAT/PCR test), several times over 4 months now to fulfill the 1 day COVID test requirement on international flights to the US. This kit is officially accepted by the CDC for travel to the United States, and as of Dec 6, 2021, a COVID-19 test (molecular or antigen like this one) is required within 1 calendar day of flight departure to the US. Previously, they accepted a test within 72 hours of departure.