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

Return flights

06 Aug - 20 Aug	Avianca	direct
29 Aug - 07 Sep	Avianca	direct
15 Aug - 31 Aug	Avianca
21 Aug - 28 Aug	Copa
21 Aug - 28 Aug	Avianca	direct
21 Aug - 25 Aug	Avianca	direct
16 Aug - 30 Aug	Avianca	direct
14 Aug - 29 Aug	Avianca	direct
17 Aug - 17 Aug	Avianca	direct
07 Aug - 17 Aug	American Airlines
07 Aug - 12 Aug	Avianca
29 Aug - 01 Sep	Avianca
22 Aug - 01 Sep	Avianca
29 Aug - 01 Sep	Avianca	direct
27 Aug - 10 Sep	Avianca	direct
22 Aug - 01 Sep	Avianca	direct
28 Aug - 06 Sep	Avianca	direct
30 Aug - 06 Sep	Avianca	direct
30 Aug - 07 Sep	Avianca	direct
29 Aug - 06 Sep	Avianca	direct

Also check the deals for one-way flights from San Francisco to San Salvador in August.

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

Return flights