I have found flying from the West Coast..first LAX for years and now SFO...that flying to St Thomas the ferrying is much cheaper. I used to fly into San Juan when American Eagle was there and tied to American but..with that gone..the current airlines from San Juan to Beef Island ,Tortola , (not Road Town) seem quite $$$$ and not very reliable.Others will disagree but that's what I've found from owning a home there and going back and forth at least three times a year since the late 80's.