Cheapest return flights from Austin to San Juan in December from 160€

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

Return flights

31 Dec - 15 Jan Spirit Airlines
31 Dec - 10 Jan Spirit Airlines
31 Dec - 13 Jan Spirit Airlines
30 Dec - 15 Jan Spirit Airlines
30 Dec - 10 Jan Spirit Airlines
14 Dec - 22 Dec Frontier Airlines
30 Dec - 13 Jan Spirit Airlines
14 Dec - 24 Dec Frontier Airlines
28 Dec - 15 Jan Spirit Airlines
31 Dec - 18 Jan Spirit Airlines
28 Dec - 10 Jan Spirit Airlines
12 Dec - 21 Dec Frontier Airlines
07 Dec - 14 Dec Frontier Airlines
31 Dec - 12 Jan Spirit Airlines
12 Dec - 25 Dec Frontier Airlines
15 Dec - 25 Dec Frontier Airlines
14 Dec - 21 Dec Frontier Airlines
14 Dec - 25 Dec Frontier Airlines
11 Dec - 14 Dec Frontier Airlines
14 Dec - 18 Dec Frontier Airlines

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

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