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

Return flights

13 Nov - 20 Nov	United
05 Nov - 18 Nov	Southwest Airlines
11 Nov - 19 Nov	Southwest Airlines
03 Nov - 08 Nov	Southwest Airlines
27 Nov - 07 Dec	Avianca
13 Nov - 19 Nov	Southwest Airlines
19 Nov - 23 Nov	Southwest Airlines
09 Nov - 15 Nov	Southwest Airlines
14 Nov - 23 Nov	Southwest Airlines
07 Nov - 15 Nov	Southwest Airlines
12 Nov - 16 Nov	Southwest Airlines
26 Nov - 07 Dec	Southwest Airlines

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

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 November from $429

Return flights