Cheapest return flights from Ontario to San Juan in January from 336€

AirHint found the following cheapest return flights from Ontario (ONT) to San Juan (SJU) in January 2026 (see full year).

Return flights

26 Jan - 31 Jan Southwest Airlines
29 Jan - 06 Feb Southwest Airlines
13 Jan - 20 Jan Southwest Airlines
25 Jan - 01 Feb Southwest Airlines
31 Jan - 11 Feb Southwest Airlines
20 Jan - 26 Jan Southwest Airlines
06 Jan - 06 Feb Southwest Airlines
23 Jan - 25 Jan Southwest Airlines
12 Jan - 17 Jan Southwest Airlines
18 Jan - 25 Jan Southwest Airlines
18 Jan - 01 Feb Southwest Airlines
22 Jan - 26 Jan Southwest Airlines
11 Jan - 25 Jan Southwest Airlines
05 Jan - 12 Jan Southwest Airlines
02 Jan - 09 Jan Southwest Airlines
25 Jan - 08 Feb Southwest Airlines

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

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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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