Cheapest return flights from Ontario to San Francisco in July from $51

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

Return flights

30 Jul - 30 Jul United direct
04 Jul - 07 Jul Frontier Airlines direct
25 Jul - 28 Jul Frontier Airlines direct
28 Jul - 04 Aug Frontier Airlines direct
17 Jul - 20 Jul United direct
18 Jul - 21 Jul Frontier Airlines direct
16 Jul - 20 Jul United direct
26 Jul - 26 Jul United direct
01 Jul - 07 Jul United direct
04 Jul - 11 Jul Frontier Airlines direct
14 Jul - 21 Jul Frontier Airlines direct
31 Jul - 11 Aug Frontier Airlines
24 Jul - 01 Aug Frontier Airlines
30 Jul - 06 Aug Frontier Airlines
28 Jul - 02 Aug United direct
02 Jul - 05 Aug Southwest Airlines
29 Jul - 01 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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