Cheapest one-way flights from San Francisco to Ontario in October from 34€

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

One-Way flights

16 Oct Frontier Airlines direct
20 Oct Frontier Airlines direct
02 Oct Frontier Airlines direct
06 Oct Frontier Airlines direct
09 Oct Frontier Airlines direct
13 Oct Frontier Airlines direct
23 Oct Frontier Airlines direct
17 Oct Frontier Airlines direct
24 Oct Frontier Airlines direct
03 Oct Frontier Airlines direct

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

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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