Cheapest return flights from Austin to San Juan in December from 132€

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

Return flights

07 Dec - 13 Dec Frontier Airlines
31 Dec - 09 Jan Frontier Airlines
30 Dec - 09 Jan Frontier Airlines
01 Dec - 06 Dec jetBlue
15 Dec - 21 Dec Frontier Airlines
11 Dec - 15 Dec Frontier Airlines
05 Dec - 13 Dec Spirit Airlines
12 Dec - 21 Dec Frontier Airlines
03 Dec - 08 Dec Frontier Airlines
12 Dec - 20 Dec Spirit Airlines
05 Dec - 09 Dec Frontier Airlines
05 Dec - 10 Dec Frontier Airlines
31 Dec - 13 Jan Spirit Airlines
31 Dec - 12 Jan Spirit Airlines
30 Dec - 13 Jan Spirit Airlines
31 Dec - 08 Jan Spirit Airlines
31 Dec - 15 Jan Spirit Airlines
30 Dec - 12 Jan Spirit Airlines
31 Dec - 11 Jan Spirit Airlines
30 Dec - 06 Jan Frontier Airlines

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

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