Cheapest return flights from San Francisco (SFO) to Ontario (ONT), July

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
25 Jul 01 Aug Frontier Airlines
Direct Flight
31 Jul 04 Aug Frontier Airlines
Direct Flight
21 Jul 04 Aug Frontier Airlines
21 Jul 04 Aug Frontier Airlines
Direct Flight
21 Jul 03 Aug Frontier Airlines
Direct Flight
24 Jul 27 Jul Frontier Airlines
Direct Flight
27 Jul 31 Jul Frontier Airlines
Direct Flight
21 Jul 24 Jul Frontier Airlines
Direct Flight
25 Jul 12 Aug Southwest Airlines
28 Jul 04 Aug Southwest Airlines
31 Jul 05 Aug Southwest Airlines
25 Jul 04 Aug Southwest Airlines
19 Jul 19 Jul Frontier Airlines
30 Jul 06 Aug Southwest Airlines
27 Jul 27 Jul Southwest Airlines
29 Jul 29 Jul Southwest Airlines
31 Jul 31 Jul Southwest Airlines
25 Jul 27 Jul Southwest Airlines
26 Jul 29 Jul Southwest Airlines
26 Jul 31 Jul Southwest Airlines
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deals for one-way flights from San Francisco to Ontario in July.

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Updated Jul 5, 2026.

About these fares

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