American Airlines has round-trip flights from San Antonio (SAT) to Saint Croix (STX) for $309-$374 with a connection. Flights in April, August, and September. No Monday departures. Very few weekends available. Origin/Destination reversible.
Click for more details and booking links Cheap Flights: San Antonio to/from Saint Croix $309-$374 r/t [Apr, Aug-Sep] – American Airlines