Cheapest return flights from Ontario to San Jose in October from 428€

AirHint found the following cheapest return flights from Ontario (ONT) to San Jose (SJO) in October 2025 (see full year).

Return flights

24 Oct - 04 Nov Southwest Airlines
30 Oct - 03 Nov Southwest Airlines
23 Oct - 03 Nov Southwest Airlines
01 Oct - 26 Oct Southwest Airlines
10 Oct - 16 Oct Southwest Airlines
11 Oct - 16 Oct Southwest Airlines
08 Oct - 12 Oct Southwest Airlines

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

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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