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

Return flights

01 Dec - 08 Dec	British Airways
02 Dec - 09 Dec	British Airways
03 Dec - 10 Dec	British Airways
09 Dec - 16 Dec	British Airways
05 Dec - 12 Dec	British Airways
07 Dec - 14 Dec	British Airways
04 Dec - 11 Dec	Air France
06 Dec - 13 Dec	Air France
10 Dec - 17 Dec	Air France
11 Dec - 18 Dec	British Airways
30 Dec - 06 Jan	Air France
31 Dec - 07 Jan	British Airways
29 Dec - 05 Jan	Air France
14 Dec - 03 Jan	British Airways
28 Dec - 04 Jan	British Airways
25 Dec - 01 Jan	British Airways
26 Dec - 02 Jan	British Airways
27 Dec - 03 Jan	British Airways
18 Dec - 05 Jan	Air Canada

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 519€

Return flights