Cheapest return flights from Austin to San Juan in December from $333

AirHint found the following cheapest return flights from Austin (AUS) to San Juan (SJU) in December 2025 (see full year).

Return flights

02 Dec - 23 Dec United
03 Dec - 23 Dec United
04 Dec - 08 Dec United
27 Dec - 02 Jan Southwest Airlines
22 Dec - 31 Dec Delta
25 Dec - 31 Dec American Airlines
20 Dec - 05 Jan Southwest Airlines
21 Dec - 31 Dec Southwest Airlines
19 Dec - 04 Jan Southwest Airlines

Also check the deals for one-way flights from Austin to San Juan in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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