Cheapest return flights from Ontario to San Jose in April from $402

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

03 Apr - 06 Apr Frontier Airlines
29 Apr - 06 May Volaris
01 Apr - 08 Apr Avianca
08 Apr - 24 Apr Avianca
16 Apr - 23 Apr Frontier Airlines
02 Apr - 09 Apr Southwest Airlines
27 Apr - 06 May Southwest Airlines
03 Apr - 07 Apr Avianca
01 Apr - 07 Apr Avianca
03 Apr - 09 Apr Avianca
01 Apr - 19 Apr Avianca
17 Apr - 30 Apr Southwest Airlines
22 Apr - 01 May Southwest Airlines
22 Apr - 02 May Southwest Airlines
11 Apr - 14 May Southwest Airlines
11 Apr - 02 May Southwest Airlines

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

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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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