Cheapest one-way flights from Austin (AUS) to San Juan (SJU), December

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
05 Dec Southwest Airlines
12 Dec Southwest Airlines
21 Dec Frontier Airlines
05 Dec Southwest Airlines
Direct Flight
29 Dec United
30 Dec United
12 Dec Southwest Airlines
Direct Flight
20 Dec Frontier Airlines
27 Dec Frontier Airlines
28 Dec Frontier Airlines
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deals for return flights from Austin to San Juan in December.

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Updated Jul 21, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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