Cheapest return flights from Ontario to San Juan in June from 416€

AirHint found the following cheapest return flights from Ontario (ONT) to San Juan (SJU) in June 2026 (see full year).

Return flights

10 Jun - 16 Jun Southwest Airlines
10 Jun - 17 Jun Southwest Airlines
22 Jun - 27 Jun Southwest Airlines
12 Jun - 19 Jun Southwest Airlines
11 Jun - 19 Jun Southwest Airlines
15 Jun - 20 Jun Southwest Airlines
29 Jun - 06 Jul Southwest Airlines
13 Jun - 22 Jun Southwest Airlines
13 Jun - 21 Jun Southwest Airlines
14 Jun - 20 Jun Southwest Airlines
19 Jun - 22 Jun Southwest Airlines

Also check the deals for one-way flights from Ontario to San Juan in June.

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