Cheapest return flights from Austin to San Juan in December from 248€

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

Return flights

10 Dec - 15 Dec Southwest Airlines
10 Dec - 14 Dec Southwest Airlines
11 Dec - 15 Dec Southwest Airlines
13 Dec - 20 Dec Southwest Airlines
15 Dec - 22 Dec Southwest Airlines
14 Dec - 21 Dec Southwest Airlines
10 Dec - 30 Dec Southwest Airlines
14 Dec - 24 Dec Spirit Airlines
13 Dec - 15 Dec Spirit Airlines
13 Dec - 24 Dec Spirit Airlines
27 Dec - 02 Jan Southwest Airlines
27 Dec - 03 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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