Traveling overseas for less then 48 hours. Can I take Rapid test before the flight out and use it for the return flight (since it’s less then 72 hours from the test) or I need to take the test abroad?
No personal experience, but this was on the CDC website:
Can a test taken before departure from the US be used to return within the 3-day timeframe? How will testing requirements be handled for short trips?
If a trip is shorter than 3 days, a viral test taken in the United States can be used to fulfill the requirements of the Order as long as the specimen was taken no more than three days before the return flight to the US departs. If the return travel is delayed longer than 3 days after the test, the passenger will need to be retested before the return flight.
Travelers considering this option should additionally consider the availability of appropriate testing capacity at their destinations, and the time frame needed to obtain results, as a contingency when making plans for travel.
https://www.cdc.gov/coronavirus/2019-ncov/travelers/testing-international-air-travelers.html