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
12 Jan - 23 Jan	United
27 Jan - 03 Feb	United
17 Jan - 24 Jan	United
20 Jan - 27 Jan	United
23 Jan - 30 Jan	United
31 Jan - 07 Feb	United
06 Jan - 14 Jan	United
26 Jan - 02 Feb	United
07 Jan - 14 Jan	United
08 Jan - 15 Jan	United
25 Jan - 01 Feb	Air Transat
04 Jan - 14 Jan	United
29 Jan - 05 Feb	United
04 Jan - 11 Jan	Air Transat
25 Jan - 08 Feb	Air Transat
31 Jan - 08 Feb	United
03 Jan - 28 Feb	WestJet
01 Jan - 28 Feb	WestJet
02 Jan - 28 Feb	WestJet

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 240€

Return flights