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

Return flights

06 May - 13 May	Copa
20 May - 27 May	Copa
26 May - 02 Jun	Copa
14 May - 21 May	Air Canada
07 May - 14 May	Air Canada
21 May - 28 May	Air Canada
04 May - 11 May	Air Transat	direct
18 May - 25 May	Air Transat	direct
11 May - 18 May	Air Transat	direct
25 May - 01 Jun	Air Transat	direct
12 May - 19 May	Copa
01 May - 08 May	Air Transat	direct
29 May - 05 Jun	Air Transat	direct
27 May - 03 Jun	United
26 May - 09 Jun	Copa
13 May - 08 Jun	Copa
28 May - 04 Jun	Copa
31 May - 09 Jun	Copa
31 May - 30 Jun	Avianca
31 May - 07 Jun	Copa

Also check the deals for one-way flights from Montreal to San Jose 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 Jose in May from $461

Return flights