| Cheap Flights: Austin or San Antonio to/from San Jose or Liberia, Costa Rica $311-$325 r/t [June-July] â Southwest Southwest has round-trip flights from Austin or San Antonio (AUS/SAT) to San Jose or Liberia, Costa Rica (SJO, LIR) for $311-$325 with a connection. $137-$184 each-way. June-July. Weekends available. Origin/Destination reversible. Costa Rica has additional entry requirements due to COVID. You must complete the online Health Assessment and you must purchase travel insurance. Details on this process is on visitcostarica.com. Southwest does not charge any change or cancellation fees. Want a notification sent straight to your phone when any new deals are found? Join our Telegram channel and never miss another deal. We donât charge a subscription fee. All of 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 our content, you are being ripped off. We send out a daily recap of every fare that is priced less than the 9-month moving average to our Patreon Supporters. If youâre interested in our analytical content, consider supporting our work on Patreon. Click for more details and booking links Cheap Flights: Austin or San Antonio to/from San Jose or Liberia, Costa Rica $311-$325 r/t [June-July] â Southwest . | 