Cheapest return flights from San Francisco to San Juan in September from 316€

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

Return flights

16 Sep - 27 Sep United
26 Sep - 29 Sep Delta
05 Sep - 13 Sep United
20 Sep - 23 Sep United
02 Sep - 23 Sep United
24 Sep - 29 Sep United
26 Sep - 04 Oct United
05 Sep - 09 Sep United
19 Sep - 22 Sep United
08 Sep - 16 Sep United
09 Sep - 16 Sep United

Also check the deals for one-way flights from San Francisco to San Juan in September.

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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