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

Return flights

09 Dec - 16 Dec	Air France
10 Dec - 17 Dec	Air France
12 Dec - 19 Dec	Air France
15 Dec - 22 Dec	Air France
11 Dec - 18 Dec	Air Transat
17 Dec - 24 Dec	Air France
31 Dec - 07 Jan	FrenchBee
30 Dec - 06 Jan	Porter Airlines (Canada) Ltd
14 Dec - 21 Dec	Air France
13 Dec - 20 Dec	Azores Airlines
24 Dec - 31 Dec	Air France
18 Dec - 10 Jan	Air Transat
16 Dec - 23 Dec	Air France
29 Dec - 05 Jan	Porter Airlines (Canada) Ltd
25 Dec - 01 Jan	Air France
30 Dec - 04 Jan	Porter Airlines (Canada) Ltd
28 Dec - 04 Jan	Porter Airlines (Canada) Ltd
27 Dec - 03 Jan	Porter Airlines (Canada) Ltd
27 Dec - 05 Jan	Air France
26 Dec - 02 Jan	Air France

Also check the deals for one-way flights from Montreal to Helsinki 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 Helsinki in December from 601€

Return flights