Cheapest return flights from Ontario to San Jose in April from $492

AirHint found the following cheapest return flights from Ontario (ONT) to San Jose (SJO) in April 2026 (see full year).

Return flights

23 Apr - 02 May Avianca
23 Apr - 01 May Avianca
11 Apr - 22 Apr Avianca
08 Apr - 22 Apr Southwest Airlines
22 Apr - 02 May Southwest Airlines
09 Apr - 14 Apr Avianca
28 Apr - 03 May Southwest Airlines
26 Apr - 03 May Southwest Airlines
09 Apr - 13 Apr Avianca
23 Apr - 03 May Southwest Airlines
24 Apr - 03 May Southwest Airlines
01 Apr - 06 Apr Southwest Airlines
25 Apr - 03 May Southwest Airlines
03 Apr - 07 Apr Southwest Airlines
19 Apr - 26 Apr GOL Linhas Aéreas
06 Apr - 13 Apr Southwest Airlines
22 Apr - 05 May Volaris
01 Apr - 05 Apr GOL Linhas Aéreas
03 Apr - 11 Apr Southwest Airlines

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

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