Cheapest return flights from San Francisco to Ontario in August from 32€

AirHint found the following cheapest return flights from San Francisco (SFO) to Ontario (ONT) in August 2025 (see full year).

Return flights

04 Aug - 11 Aug Frontier Airlines direct
04 Aug - 08 Aug Frontier Airlines direct
01 Aug - 04 Aug Frontier Airlines direct
11 Aug - 16 Aug Frontier Airlines
15 Aug - 17 Aug Frontier Airlines direct
07 Aug - 09 Aug United direct
28 Aug - 31 Aug Frontier Airlines direct
11 Aug - 14 Aug Frontier Airlines
03 Aug - 08 Aug Frontier Airlines direct
11 Aug - 14 Aug United direct
29 Aug - 06 Sep Frontier Airlines
23 Aug - 08 Sep Southwest Airlines
28 Aug - 06 Sep Southwest Airlines
24 Aug - 04 Sep Southwest Airlines
19 Aug - 20 Sep Southwest Airlines
30 Aug - 02 Sep Southwest Airlines
31 Aug - 06 Sep Southwest Airlines
30 Aug - 07 Sep Southwest Airlines
30 Aug - 01 Sep Southwest Airlines
31 Aug - 07 Sep Southwest Airlines

Also check the deals for one-way flights from San Francisco to Ontario in August.

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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