Cheapest return flights from San Francisco to San Diego in September from 53€

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

Return flights

27 Sep - 04 Oct Frontier Airlines direct
30 Sep - 30 Sep Alaska Airlines direct
13 Sep - 20 Sep Frontier Airlines direct
29 Sep - 02 Oct Southwest Airlines direct
29 Sep - 06 Oct Alaska Airlines direct
25 Sep - 01 Oct Alaska Airlines direct
20 Sep - 23 Sep Frontier Airlines direct
24 Sep - 27 Sep Alaska Airlines direct
28 Sep - 02 Oct United direct
25 Sep - 27 Sep Alaska Airlines direct
18 Sep - 20 Sep Frontier Airlines
20 Sep - 29 Sep Frontier Airlines
25 Sep - 29 Sep Hawaiian Airlines direct
27 Sep - 29 Sep Frontier Airlines
17 Sep - 30 Sep Hawaiian Airlines direct
13 Sep - 14 Oct Southwest Airlines direct
26 Sep - 05 Oct Frontier Airlines
26 Sep - 05 Oct United direct

Also check the deals for one-way flights from San Francisco to San Diego 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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