Cheapest return flights from Ontario to San Francisco in July from $228

Best time to book flights for Ontario (ONT) to San Francisco (SFO) flights at AirHint

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

Return flights

31 Jul - 11 Aug Frontier Airlines direct
09 Jul - 19 Jul United direct
08 Jul - 15 Jul Southwest Airlines
23 Jul - 27 Jul Southwest Airlines
18 Jul - 22 Jul Southwest Airlines
09 Jul - 20 Jul Southwest Airlines
21 Jul - 28 Jul Southwest Airlines
18 Jul - 02 Aug Southwest Airlines
07 Jul - 13 Jul Southwest Airlines

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

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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