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

Return flights

25 Sep - 26 Sep	Delta
11 Sep - 19 Sep	Avianca
10 Sep - 25 Sep	Avianca
10 Sep - 26 Sep	Avianca
11 Sep - 26 Sep	Avianca
10 Sep - 24 Sep	Avianca
11 Sep - 24 Sep	Avianca
11 Sep - 25 Sep	Avianca
18 Sep - 27 Sep	Avianca
17 Sep - 27 Sep	Avianca
29 Sep - 08 Oct	Avianca
19 Sep - 05 Oct	Avianca
20 Sep - 05 Oct	Avianca
19 Sep - 04 Oct	Avianca
26 Sep - 11 Oct	Avianca

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

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 Lima in September from $441

Return flights