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

Return flights

18 May - 25 May	Avianca
20 May - 27 May	Avianca
11 May - 18 May	Avianca
11 May - 25 May	Air Transat	direct
11 May - 27 May	Avianca
25 May - 01 Jun	Avianca
27 May - 03 Jun	Avianca
06 May - 18 May	Avianca
17 May - 31 May	Avianca
03 May - 10 May	Avianca
06 May - 13 May	Avianca
10 May - 17 May	Avianca
31 May - 30 Jun	Avianca
31 May - 12 Jun	Avianca
29 May - 05 Jun	Avianca
28 May - 04 Jun	Avianca
30 May - 06 Jun	Avianca
26 May - 02 Jun	Avianca
25 May - 01 Jun	Air Transat	direct
29 May - 05 Jun	Air Transat	direct

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 276€

Return flights