I live just outside Boston and there are several free testing sites that promise results within 24 to 48 hours. We are traveling to St. Thomas on Saturday so yesterday was the first day we could get a test to be within the time frame. We went to a testing site down the road from our house that was open from 2-7 but when we got there at 5 we were told the line was shut off, too many people! So we headed to a different site 2 towns over. There was also a rather long line and we got in. Lucky we got there when we did because they closed the line 30 minutes later. It took us 2 hours but we got the tests and expect results either today or tomorrow. Our back up plan was the rapid test from AFC Urgent Care, but hopefully our results are quick and we do not have to worry about it.