Cheapest one-way flights from San Francisco to San Diego in September from $26

Best time to book flights for San Francisco (SFO) to San Diego (SAN) flights at AirHint

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

One-Way flights

07 Sep Frontier Airlines direct
27 Sep Frontier Airlines direct
20 Sep Frontier Airlines direct
12 Sep Alaska Airlines direct
14 Sep Alaska Airlines direct
30 Sep Alaska Airlines direct
01 Sep Alaska Airlines direct
02 Sep Alaska Airlines direct
18 Sep Frontier Airlines direct
23 Sep Alaska Airlines direct

Also check the deals for return 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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