Cheapest one-way flights from Ontario to San Jose in August from 118€

AirHint found the following cheapest one-way flights from Ontario (ONT) to San Jose (SJO) in August 2025 (see full year).

One-Way flights

12 Aug Frontier Airlines
21 Aug Southwest Airlines
19 Aug Southwest Airlines
20 Aug Southwest Airlines
18 Aug Southwest Airlines
04 Aug United
13 Aug Southwest Airlines
03 Aug United
06 Aug United
05 Aug Frontier Airlines

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

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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