Cheapest return flights from Ontario to San Juan in August from $468

Best time to book flights for Ontario (ONT) to San Juan (SJU) flights at AirHint

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

Return flights

07 Aug - 11 Aug Southwest Airlines

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

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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