| Cheap Flights: Austin to Saint Thomas $247-$272 r/t [January-June.2021] â American Airlines American Airlines has round-trip flights from Austin (AUS) to Saint Thomas (STT) for $247-$272 with a connection. Flights January to June. No Friday departures. Extended weekends available. A negative COVID PCR test result is required for entry. Change fees are waived and carry-on bag is allowed for free. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate. Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal. Patreon supporters receive a recap of all the airfare deals currently available from Austin and San Antonio everyday. We donât charge a subscription fee. Our deal notifications are available for FREE via Instagram, Facebook, Twitter, Telegram, our Webpage, and our E-mail list. If you are paying someone a subscription fee for this content, you are being ripped off. Click for more details and booking links Cheap Flights: Austin to Saint Thomas $247-$272 r/t [January-June.2021] â American Airlines . | 