Cheapest return flights from Austin to San Juan in August from $193

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

Return flights

28 Aug - 03 Sep Frontier Airlines
24 Aug - 30 Aug Frontier Airlines
10 Aug - 15 Aug Frontier Airlines
01 Aug - 14 Aug Frontier Airlines
08 Aug - 11 Aug Frontier Airlines
29 Aug - 10 Sep Spirit Airlines
01 Aug - 04 Aug Frontier Airlines
29 Aug - 01 Sep Spirit Airlines
09 Aug - 21 Aug Spirit Airlines
09 Aug - 15 Aug Spirit Airlines
08 Aug - 12 Aug Spirit Airlines
10 Aug - 12 Aug Spirit Airlines
01 Aug - 05 Aug Frontier Airlines
29 Aug - 11 Sep Spirit Airlines
29 Aug - 08 Sep Spirit Airlines
29 Aug - 07 Sep Spirit Airlines

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

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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