Cheapest one-way flights from Ontario to San Juan in April from $136

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 April 2025 (see full year).

One-Way flights

14 Apr Frontier Airlines
25 Apr Frontier Airlines
26 Apr Frontier Airlines
07 Apr Frontier Airlines
11 Apr Frontier Airlines
08 Apr Frontier Airlines
09 Apr Frontier Airlines
28 Apr Frontier Airlines
21 Apr Frontier Airlines
04 Apr Frontier Airlines

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

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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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