Cheapest one-way flights from Ontario to San Francisco in March from $17

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

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

One-Way flights

02 Mar Frontier Airlines direct
04 Mar United direct
05 Mar United direct
13 Mar Frontier Airlines direct
17 Mar Frontier Airlines direct
24 Mar Frontier Airlines direct
31 Mar Frontier Airlines direct
09 Mar Frontier Airlines direct
14 Mar Frontier Airlines direct
27 Mar Frontier Airlines direct

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

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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