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

Return flights

12 May - 28 May	United
05 May - 12 May	United
09 May - 16 May	United
28 May - 04 Jun	United
01 May - 08 May	United
27 May - 03 Jun	United
03 May - 10 May	United
21 May - 28 May	United
30 May - 06 Jun	United
17 May - 24 May	United
12 May - 19 May	United
13 May - 20 May	United
23 May - 30 May	United
31 May - 07 Jun	United
25 May - 01 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 241€

Return flights