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

Return flights

03 Dec - 10 Dec	Lufthansa
02 Dec - 09 Dec	Air France
04 Dec - 11 Dec	Air France
01 Dec - 08 Dec	Air France
07 Dec - 14 Dec	Air France
09 Dec - 16 Dec	Lufthansa
08 Dec - 15 Dec	Air France
06 Dec - 13 Dec	Air France
11 Dec - 18 Dec	Lufthansa
05 Dec - 27 Dec	FrenchBee
31 Dec - 07 Jan	Porter Airlines (Canada) Ltd
22 Dec - 17 Jan	Air Canada
29 Dec - 05 Jan	Porter Airlines (Canada) Ltd
30 Dec - 06 Jan	Porter Airlines (Canada) Ltd
25 Dec - 01 Jan	Air France
28 Dec - 04 Jan	Air Canada
26 Dec - 02 Jan	KLM
27 Dec - 03 Jan	Porter Airlines (Canada) Ltd
18 Dec - 02 Jan	Air Canada
20 Dec - 03 Jan	Air Transat

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 $657

Return flights