This is an awesome main cabin fare!
Delta Airlines have round trip airfares travelling from San Diego (SAN) to Charlotte Amalie St. Thomas USVI (STT) for $252, making 1 stop. You do not need a US Passport to travel to the US Virgin Islands.
Departs SAN: Sept 11, 18, 21, 25
Returns: Sept 18,19, 21, 25, 26, 28; Oct 2, 9, 16, 26
Use dates and book it on Priceline [priceline.com]
. Bundling hotel with airfare will save money.