Cheapest return flights from Ontario to San Jose in April from $423

Best time to book flights for Ontario (ONT) to San Jose (SJO) flights at AirHint

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

Return flights

13 Apr - 13 May Frontier Airlines
13 Apr - 12 May Frontier Airlines
13 Apr - 14 May American Airlines
12 Apr - 12 May Frontier Airlines
26 Apr - 10 May Volaris
10 Apr - 16 Apr United
10 Apr - 15 Apr United
22 Apr - 29 Apr Volaris
10 Apr - 14 Apr United
12 Apr - 15 Apr Volaris
25 Apr - 10 May Southwest Airlines
12 Apr - 26 Apr Volaris
07 Apr - 09 Apr Southwest Airlines
27 Apr - 07 May Southwest Airlines
24 Apr - 06 May Avianca
24 Apr - 04 May Southwest Airlines
25 Apr - 04 May Southwest Airlines
16 Apr - 28 Apr Southwest Airlines
14 Apr - 25 Apr Southwest Airlines
26 Apr - 28 Apr Southwest Airlines

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

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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