It's not. It has been reported quite a bit that it was in the BVI, and it's not. The island's name Little St. James. It's small Island between St. Thomas and St. John, in the USVI, South of Red Hook. You can see it past Great St. James when you take the ferry from Red Hook across to St. John or the BVI.
There are a bunch of dive sites around St. James, Little St. James, and Dog Island a little further South that I used to hit for a shallow dive after a deep one at French Cap, which is much further South and West past Buck Island (French Cap has gorgeous formations with huge fish). I never actually set foot on Little St. James but I have on Dog. When I lived down there in the late '90s there was nothing on either of those islands. Now Google Earth shows they've demoed the weird temple with the stripes Epstein built, but his palatial casa is still there.
There is no airstrip on Greater St. James. You fly into Cyril E. King in Charlotte Amalia (where he probably kept his jet), take a taxi to Red Hook, and then there are ferries and private boats to take you to St. John, BVI, or wherever you want to go. To get to St. Croix you take the Bombardier from Charlotte Amalia harbor straight south. The only other choice of airport is Tortola in the BVI, and then you have to clear customs. Honestly, this is just how people get around and it would draw no suspicion to get to your place by boat. He clearly chose this because he could slip and slip out with no passport and no customs. An ID is all you need to go there like any other American airport. That's how he got them in an out drawing no suspicion. Tons of young girls in bikinis like natural camouflage.
It's a fucking rogues gallery down there. There are many felons who served federal time and made their way down there after prison with all their cash (somewhat like Alaska). I knew quite a few including some celebrities who served time, some Wall Street criminals who you would know, and a couple of retired rock and rollers who like to scuba dive. Seems just to depend on how much cash they hid before they went down.
I lived on Mahogany Run golf course on the North side of St. Thomas (I heard it's gone and all developed now), and would regularly run in the morning with a Wall Street junk bond thief, and a drug dealer rapper who both got out of prison that same year. Both very nice guys... One of my dive masters did fifteen years for selling cocaine in Ohio, and him and his dad were huge bow hunters. He had all his mounts shipped to his house. Full elk and mountain lion mounts... ridiculous. He was a good guy too. It's a strange place to live and work.