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

Return flights

06 May - 17 May	Arajet
20 May - 27 May	United
13 May - 23 May	Arajet
12 May - 26 May	United
26 May - 16 Jun	United
03 May - 09 May	United
19 May - 26 May	United
02 May - 09 May	United
09 May - 16 May	United
27 May - 03 Jun	United
01 May - 08 May	United
06 May - 13 May	WestJet
13 May - 03 Jun	United
20 May - 03 Jun	United
28 May - 04 Jun	WestJet
19 May - 05 Jun	WestJet
26 May - 02 Jun	WestJet
30 May - 06 Jun	WestJet
27 May - 17 Jun	WestJet
29 May - 05 Jun	WestJet

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 $236

Return flights