Cheapest one-way flights from San Francisco to San Juan in August from $136

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

One-Way flights

23 Aug Frontier Airlines
15 Aug Frontier Airlines
24 Aug Frontier Airlines
11 Aug Frontier Airlines
06 Aug Frontier Airlines
26 Aug American Airlines
25 Aug American Airlines
08 Aug Frontier Airlines
20 Aug American Airlines
13 Aug American Airlines

Also check the deals for return 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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Cheap car rent in San Juan

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