| Cheap Flights: Austin or San Antonio to Key West $187-$198 r/t â American Airlines Due to the covid-19 pandemic, we do not recommend booking travel with departures between May and June. This fare has departures later in the year. American Airlines has round-trip flights from Austin or San Antonio (AUS/SAT) to Key West (EYW) for $187-$198 with a connection. Flights July to November. Weekends available. Note: Carry-on bag is allowed for free on American Airlines. 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. If you appreciate what I do and want to help support my work then consider becoming a Patreon supporter. Supporters receive a daily airfare recap of all the airfare deals currently available Austin and San Antonio. 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. Read More Cheap Flights: Austin or San Antonio to Key West $187-$198 r/t â American Airlines . | 