AirHint found the following cheapest return flights from Montreal (YUL) to San Jose (SJO) in December 2025 (see full year).

Return flights

03 Dec - 10 Dec	Avianca
03 Dec - 21 Dec	Avianca
02 Dec - 07 Dec	Air Canada	direct
02 Dec - 24 Dec	Air Canada	direct
09 Dec - 25 Dec	Air Canada
05 Dec - 12 Dec	Air Transat
04 Dec - 11 Dec	Air Transat
10 Dec - 15 Jan	Air Transat	direct
14 Dec - 16 Dec	Air Canada
01 Dec - 08 Dec	Avianca
07 Dec - 14 Dec	Air Canada
10 Dec - 12 Jan	Air Transat	direct
28 Dec - 20 Jan	Avianca
31 Dec - 07 Jan	Air Transat
31 Dec - 11 Jan	Air Transat
14 Dec - 14 Jan	Avianca
28 Dec - 20 Jan	Air Transat	direct
25 Dec - 01 Jan	Avianca
29 Dec - 12 Jan	Delta
29 Dec - 12 Jan	Air Transat	direct

Also check the deals for one-way flights from Montreal to San Jose in December.

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 December from 286€

Return flights