Cheapest return flights from San Francisco to San Juan in August from 346€

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

Return flights

24 Aug - 06 Sep Frontier Airlines
30 Aug - 05 Sep United
31 Aug - 06 Sep Frontier Airlines
22 Aug - 06 Sep Frontier Airlines
30 Aug - 06 Sep Frontier Airlines
28 Aug - 05 Sep Frontier Airlines
24 Aug - 31 Aug Frontier Airlines
23 Aug - 06 Sep Frontier Airlines
21 Aug - 24 Aug Frontier Airlines
27 Aug - 31 Aug Frontier Airlines
17 Aug - 22 Aug United
20 Aug - 27 Aug United
27 Aug - 29 Aug Frontier Airlines
17 Aug - 23 Aug United
19 Aug - 23 Aug United
21 Aug - 26 Aug Frontier Airlines
19 Aug - 26 Aug Frontier Airlines
26 Aug - 03 Sep United
28 Aug - 03 Sep Frontier Airlines
27 Aug - 01 Sep Frontier Airlines

Also check the deals for one-way flights from San Francisco 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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