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

One-Way flights

10 Aug	Frontier Airlines	direct
09 Aug	Frontier Airlines	direct
05 Aug	Southwest Airlines	direct
04 Aug	United	direct
25 Aug	Frontier Airlines	direct
01 Aug	United	direct
12 Aug	United	direct
07 Aug	Southwest Airlines	direct
02 Aug	United	direct
03 Aug	United	direct

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

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 one-way flights from San Francisco to San Diego in August from 16€

One-Way flights