AirHint found the following cheapest return flights from Ontario (ONT) to San Jose (SJO) in July 2026 (see full year).

Return flights

30 Jul - 08 Aug	Avianca
14 Jul - 21 Jul	Avianca
16 Jul - 21 Jul	Avianca
06 Jul - 14 Jul	jetBlue
13 Jul - 24 Jul	Southwest Airlines
29 Jul - 03 Aug	Copa
17 Jul - 20 Jul	Volaris
06 Jul - 24 Jul	Southwest Airlines

Also check the deals for one-way flights from Ontario to San Jose in July.

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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Cheapest return flights from Ontario to San Jose in July from $468

Return flights