AirHint found the following cheapest return flights from Toronto (YYZ) to San Juan (SJU) in December 2025 (see full year).

Return flights

09 Dec - 16 Dec	United
09 Dec - 18 Dec	United
11 Dec - 19 Dec	United
11 Dec - 16 Dec	United
11 Dec - 17 Dec	United
10 Dec - 15 Dec	United
07 Dec - 13 Dec	United
11 Dec - 21 Dec	United
11 Dec - 14 Dec	United
08 Dec - 12 Dec	United
01 Dec - 18 Jan	Flair Airlines
27 Dec - 11 Jan	WestJet
28 Dec - 04 Jan	Porter Airlines (Canada) Ltd
26 Dec - 03 Jan	WestJet
28 Dec - 04 Jan	Air Canada	direct

Also check the deals for one-way flights from Toronto to San Juan in December.

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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Cheapest return flights from Toronto to San Juan in December from 204€

Return flights