AirHint found the following cheapest return flights from Ontario (ONT) to San Jose (SJO) in July 2026 (see full year).
Return flights
| 23 Jul - 30 Jul | Avianca | ||
| 25 Jul - 01 Aug | Avianca | ||
| 04 Jul - 18 Jul | Southwest Airlines | ||
| 05 Jul - 19 Jul | Southwest Airlines | ||
| 03 Jul - 01 Aug | Southwest Airlines | ||
| 03 Jul - 17 Jul | jetBlue |
Also check the deals for one-way flights from Ontario to San Jose in July.
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