Cheapest one-way flights from Ontario to San Jose in June from $244

AirHint found the following cheapest one-way flights from Ontario (ONT) to San Jose (SJO) in June 2026 (see full year).

One-Way flights

11 Jun United
02 Jun Southwest Airlines
01 Jun Southwest Airlines
12 Jun Southwest Airlines
04 Jun Southwest Airlines
05 Jun Southwest Airlines

Also check the deals for return flights from Ontario to San Jose in June.

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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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