Cheapest return flights from Austin to San Juan in August from $331

AirHint found the following cheapest return flights from Austin (AUS) to San Juan (SJU) in August 2026 (see full year).

Return flights

17 Aug - 22 Aug Spirit Airlines
10 Aug - 15 Aug American Airlines
10 Aug - 21 Aug Spirit Airlines
21 Aug - 24 Aug Spirit Airlines
10 Aug - 22 Aug Spirit Airlines
21 Aug - 22 Aug Spirit Airlines
17 Aug - 24 Aug Spirit Airlines
10 Aug - 24 Aug Spirit Airlines
06 Aug - 10 Aug American Airlines
06 Aug - 21 Aug Spirit Airlines

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

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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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