How can I get a COVID test one day before returning to the United States from Thailand?

To return to the United States, you need either a PCR or a lateral flow test (ATK) conducted at a clinic with a certification. In Bangkok, many people use services like Dr. Donna's clinic, and there are also testing stations available at BKK airport on Floor 1, where you should allow an hour for results. If you are located outside Bangkok, you may need to specify your location to get appropriate testing advice.