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Cheapest one-way flights from San Francisco (SFO) to Ontario (ONT), August

Select a price to book. see full year.

Dates, airline, and price
Dates	Airline	Price
25 Aug	Frontier Airlines Direct Flight
19 Aug	Frontier Airlines Direct Flight
24 Aug	Frontier Airlines Direct Flight
08 Aug	Frontier Airlines Direct Flight
15 Aug	Frontier Airlines Direct Flight
09 Aug	Frontier Airlines Direct Flight
16 Aug	Frontier Airlines Direct Flight
21 Aug	Frontier Airlines Direct Flight
23 Aug	Frontier Airlines Direct Flight
04 Aug	Frontier Airlines

deals for return flights from San Francisco to Ontario in August.

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Updated Jul 18, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from San Francisco (SFO) to Ontario (ONT), August

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