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Published July 30, 2026 by

Cheap Flights: Austin to/from San Jose, Costa Rica $338-$350 round-trip [September-April] – American Airlines / United

[07/30/2026 @ 05:49 PM CT] Deal time-stamp.
[2026-08-19 16:09:00] This deal is still available, but the original date ranges may have shifted. We have updated the example date links in this post to reflect those changes. Expect prices to fluctuate by about +/- 10%.

Deals are usually valid 24 to 72 hours after posting, but can expire at any time (see time-stamp).

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American Airlines and United have round-trip flights from Austin (AUS) to San Jose, Costa Rica (SJO) for $338-$350 with a connection. Flights September to April. Weekends available. Origin/Destination reversible.

American allows one carry-on bag and one personal item for free. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.

If you use the Citi® / AAdvantage® Platinum Select® World Elite Mastercard® with AA flights, you get: a 25% inflight food and beverage discount, a $125 AA flight discount after you spend $20,000 or more in purchases during your card year, and your first checked bag is free on domestic American Airlines flights for you and up to four companions traveling on the same reservation.

United’s “Basic Economy” fares do not allow for a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding.

The personal item size on United is smaller (9 x 10 x 17 inches) than Frontier or Spirit (8 x 13 x 18 inches).

If you use the United℠ Explorer Card, your first standard checked-bag for you and your companion is free, you get priority boarding, two United Club passes per year, and you get a 25% discount on inflight purchases on United-operated flights as a statement credit.

You can usually save more money by booking your flight+hotel together as a package instead of separately.

We post new flight deals often! You can check out our other deals by returning to the Front Page of our website: escapeatx.com (linked).

Here are some other offers that we think are worth mentioning. List updated 04/21/2026.

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Use the example date links on our website to pull up the fare.

San Jose, Costa Rica fares: [2026-08-19 16:09:00] This deal is still available, but the original date ranges may have shifted. We have updated the example date links in this post to reflect those changes. Expect prices to fluctuate by about +/- 10%.

 

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  • Tips: Different booking websites will often have differing routes, prices, and availability. Before you finalize your purchase, do a quick check on Expedia, Skyscanner, and Kayak to see if any other site or airline is offering a better deal.

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Ren P. Artemio

Ren P. Artemio

Ren is the Chief Director of Nap Times at Escape Houston, Escape ATX, Cheap DFW, and Escape Flights. He really likes researching airfare and the travel industry, especially when it means getting a cheap flight to anywhere (he's not picky).

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