This quote is from the CDC website. "Are US territories considered foreign countries for the purposes of this Order?
No, the Order to present a documentation of a negative COVID-19 test or recovery from COVID-19 does not apply to air passengers flying from a US territory to a US state.

US territories include American Samoa, Guam, the Northern Mariana Islands, the Commonwealth of Puerto Rico, and the US Virgin Islands."
Has anyone here been required to show a 3 day test when flying from PR or the USVI to the mainland? I will be down at the end of May, traveling via ferry to BVI and back. Just trying to figure at what day we need to be tested for our return.