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

Return flights

24 Jan - 31 Jan	United
17 Jan - 24 Jan	United
27 Jan - 03 Feb	United
14 Jan - 21 Jan	United
23 Jan - 30 Jan	United
20 Jan - 27 Jan	United
21 Jan - 28 Jan	United
31 Jan - 07 Feb	United
07 Jan - 14 Jan	United
22 Jan - 29 Jan	United
06 Jan - 14 Jan	United
29 Jan - 05 Feb	United
19 Jan - 26 Jan	United
25 Jan - 01 Feb	Air Transat
30 Jan - 07 Feb	United
30 Jan - 08 Feb	WestJet
25 Jan - 01 Feb	Air Transat	direct

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

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 Montreal to San Juan in January from 241€

Return flights