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

Return flights

08 May - 17 May	Arajet
06 May - 17 May	Arajet
01 May - 10 May	Arajet
05 May - 12 May	United
02 May - 09 May	United
03 May - 09 May	United
03 May - 12 May	United
04 May - 09 May	United
04 May - 12 May	United
09 May - 12 May	United
03 May - 03 Jun	United
04 May - 03 Jun	United
09 May - 03 Jun	United
03 May - 02 Jun	United
04 May - 02 Jun	United
09 May - 02 Jun	United
27 May - 03 Jun	United
03 May - 01 Jun	United
04 May - 01 Jun	United
09 May - 01 Jun	United

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

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 May from $201

Return flights