Cheapest one-way flights from Ontario to San Francisco in August from 17€

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

One-Way flights

11 Aug Frontier Airlines direct
25 Aug Frontier Airlines direct
28 Aug Frontier Airlines direct
14 Aug United direct
13 Aug United direct
30 Aug United direct
23 Aug United direct
19 Aug United direct
26 Aug United direct
16 Aug United direct

Also check the deals for return flights from Ontario to San Francisco 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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