Cheapest one-way flights from Austin to San Juan in December from 101€

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

One-Way flights

07 Dec Frontier Airlines
09 Dec Spirit Airlines
10 Dec Spirit Airlines
08 Dec Delta
31 Dec American Airlines
03 Dec Spirit Airlines
06 Dec Spirit Airlines
15 Dec Spirit Airlines
30 Dec Spirit Airlines
13 Dec Spirit Airlines

Also check the deals for return flights from Austin to San Juan in December.

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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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