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

Return flights

02 May - 09 May	United
05 May - 12 May	United
01 May - 08 May	United
04 May - 11 May	United
06 May - 13 May	United
08 May - 15 May	United
10 May - 17 May	United
12 May - 19 May	United
13 May - 20 May	United
18 May - 25 May	United
31 May - 07 Jun	Avianca
26 May - 02 Jun	Air Canada
27 May - 03 Jun	Air Canada
25 May - 01 Jun	Air Canada
28 May - 04 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 257€

Return flights