Cheapest one-way flights from Ontario to San Juan in May from $221

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

AirHint found the following cheapest one-way flights from Ontario (ONT) to San Juan (SJU) in May 2025 (see full year).

One-Way flights

01 May United
24 May jetBlue

Also check the deals for return flights from Ontario to San Juan in May.

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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