Cheapest return flights from Ontario to San Juan in July from $346

AirHint found the following cheapest return flights from Ontario (ONT) to San Juan (SJU) in July 2025 (see full year).

Return flights

09 Jul - 12 Jul Frontier Airlines
12 Jul - 15 Jul Frontier Airlines
09 Jul - 16 Jul Frontier Airlines
22 Jul - 24 Jul Southwest Airlines
08 Jul - 12 Jul Southwest Airlines
29 Jul - 14 Aug Southwest Airlines
08 Jul - 15 Jul Southwest Airlines
07 Jul - 18 Jul jetBlue
01 Jul - 09 Jul Southwest Airlines
15 Jul - 22 Jul Southwest Airlines
29 Jul - 05 Aug Southwest Airlines
30 Jul - 05 Aug Southwest Airlines
01 Jul - 05 Jul jetBlue
30 Jul - 03 Aug Frontier Airlines
27 Jul - 02 Aug Southwest Airlines
28 Jul - 04 Aug Southwest Airlines
31 Jul - 04 Aug Southwest Airlines
25 Jul - 03 Aug Southwest Airlines
31 Jul - 03 Aug Southwest Airlines

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

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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