Cheapest one-way SFO–SAN flights, September

AirHint found the following cheapest one-way flights from San Francisco (SFO) to San Diego (SAN) in September 2026 (see full year).

One-Way flights

15 Sep Frontier Airlines direct
01 Sep Frontier Airlines direct
20 Sep Frontier Airlines direct
19 Sep Southwest Airlines direct
21 Sep Southwest Airlines direct
06 Sep Frontier Airlines direct
25 Sep Frontier Airlines direct

Also check the deals for return flights from San Francisco to San Diego in September.

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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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