Cheapest return flights from Ontario to San Francisco in July from $85

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

10 Jul - 12 Jul Frontier Airlines direct
26 Jul - 02 Aug Frontier Airlines direct
06 Jul - 07 Jul Frontier Airlines direct
17 Jul - 21 Jul Frontier Airlines direct
31 Jul - 11 Aug Frontier Airlines direct
13 Jul - 14 Jul Frontier Airlines direct
24 Jul - 28 Jul Frontier Airlines direct
03 Jul - 06 Jul Frontier Airlines direct
06 Jul - 13 Jul Frontier Airlines direct
27 Jul - 01 Aug Frontier Airlines direct
25 Jul - 28 Jul Frontier Airlines direct
18 Jul - 27 Jul Frontier Airlines direct
26 Jul - 30 Jul Frontier Airlines
29 Jul - 02 Aug Frontier Airlines
28 Jul - 10 Aug 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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