Cheapest one-way flights from Ontario to San Juan in December from 197€

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

One-Way flights

14 Dec Southwest Airlines
31 Dec Southwest Airlines
08 Dec Southwest Airlines
09 Dec Southwest Airlines
10 Dec Southwest Airlines
16 Dec Southwest Airlines
13 Dec Southwest Airlines
29 Dec Southwest Airlines
06 Dec Southwest Airlines
07 Dec Southwest Airlines

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

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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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