Cheapest return flights from San Francisco to San Juan in August from $349

Best time to book flights for San Francisco (SFO) to San Juan (SJU) flights at AirHint

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

Return flights

22 Aug - 28 Aug American Airlines
10 Aug - 16 Aug Frontier Airlines
11 Aug - 19 Aug United
28 Aug - 30 Aug American Airlines
14 Aug - 20 Aug United
01 Aug - 08 Aug United
23 Aug - 31 Aug American Airlines
01 Aug - 10 Aug Sun Country Airlines
01 Aug - 09 Aug Sun Country Airlines
28 Aug - 02 Sep American Airlines
02 Aug - 07 Aug Frontier Airlines
28 Aug - 01 Sep United

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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