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

Return flights

01 Oct - 05 Oct	Frontier Airlines
22 Oct - 05 Nov	United
01 Oct - 10 Oct	Copa
02 Oct - 07 Oct	Avianca	direct
03 Oct - 06 Oct	Avianca	direct
01 Oct - 10 Oct	Avianca	direct
17 Oct - 24 Oct	Frontier Airlines
01 Oct - 01 Oct	Avianca	direct
01 Oct - 05 Oct	Avianca	direct
17 Oct - 24 Oct	Avianca	direct
15 Oct - 22 Oct	Avianca	direct
30 Oct - 15 Nov	Avianca	direct
31 Oct - 18 Nov	Avianca	direct
24 Oct - 05 Nov	Avianca	direct
26 Oct - 09 Nov	Avianca	direct

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

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 October from $375

Return flights