Cheapest return flights from Austin to San Juan in December from $245

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

Return flights

07 Dec - 14 Dec Southwest Airlines
08 Dec - 11 Dec American Airlines
02 Dec - 05 Dec Spirit Airlines
07 Dec - 11 Dec Spirit Airlines
02 Dec - 11 Dec Spirit Airlines
15 Dec - 19 Dec American Airlines
08 Dec - 14 Dec Spirit Airlines
07 Dec - 25 Dec Spirit Airlines
08 Dec - 25 Dec Spirit Airlines
02 Dec - 14 Dec Spirit Airlines
31 Dec - 19 Jan Spirit Airlines
31 Dec - 05 Jan American Airlines
15 Dec - 05 Jan Spirit Airlines
27 Dec - 03 Jan Spirit Airlines
15 Dec - 03 Jan Spirit Airlines
31 Dec - 03 Jan Spirit Airlines
27 Dec - 05 Jan Spirit Airlines
16 Dec - 05 Jan Spirit Airlines
26 Dec - 03 Jan jetBlue
26 Dec - 02 Jan jetBlue

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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