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

Return flights

01 Dec - 08 Dec	Avianca
03 Dec - 10 Dec	Avianca
05 Dec - 12 Dec	Avianca
02 Dec - 09 Dec	Avianca
02 Dec - 20 Dec	Avianca
02 Dec - 22 Dec	Avianca
04 Dec - 11 Dec	Avianca
06 Dec - 13 Dec	Avianca
28 Dec - 18 Jan	Avianca
27 Dec - 10 Jan	Avianca
28 Dec - 11 Jan	Avianca
02 Dec - 22 Dec	Air Transat	direct
29 Dec - 09 Jan	Avianca
27 Dec - 09 Jan	Avianca
28 Dec - 09 Jan	Avianca
28 Dec - 11 Jan	Air Transat	direct
28 Dec - 18 Jan	Air Transat	direct
28 Dec - 09 Jan	Air Transat	direct
27 Dec - 04 Jan	Avianca
20 Dec - 30 Dec	Avianca

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 290€

Return flights