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

Return flights

27 Jan - 30 Jan	United
27 Jan - 19 Feb	United
27 Jan - 27 Feb	United
12 Jan - 06 Feb	United
12 Jan - 19 Feb	United
12 Jan - 25 Feb	United
26 Jan - 27 Feb	United
20 Jan - 30 Jan	United
12 Jan - 30 Jan	United
26 Jan - 30 Jan	United
12 Jan - 22 Jan	United
27 Jan - 25 Feb	United
12 Jan - 27 Feb	United
26 Jan - 06 Feb	United
26 Jan - 19 Feb	United
12 Jan - 21 Jan	United
20 Jan - 29 Jan	United
13 Jan - 22 Jan	United
12 Jan - 25 Jan	Porter Airlines (Canada) Ltd
12 Jan - 31 Jan	Porter Airlines (Canada) Ltd

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 238€

Return flights