Cheapest one-way flights from Ontario to San Francisco in December from 33€

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

One-Way flights

03 Dec United direct
04 Dec United direct
06 Dec United direct
09 Dec United direct
10 Dec United direct
13 Dec United direct
15 Dec United direct
16 Dec United direct
17 Dec United direct
08 Dec Frontier Airlines direct

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

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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