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

Return flights

02 Dec - 09 Dec	WestJet
07 Dec - 14 Dec	WestJet
01 Dec - 08 Dec	WestJet
06 Dec - 13 Dec	WestJet
04 Dec - 11 Dec	WestJet
05 Dec - 12 Dec	WestJet
03 Dec - 10 Dec	WestJet
03 Dec - 17 Dec	WestJet
09 Dec - 16 Dec	Porter Airlines (Canada) Ltd
08 Dec - 15 Dec	WestJet
19 Dec - 18 Jan	WestJet
30 Dec - 06 Jan	WestJet
31 Dec - 07 Jan	Air Canada
24 Dec - 21 Jan	Air France
25 Dec - 10 Jan	WestJet
24 Dec - 10 Jan	Porter Airlines (Canada) Ltd
28 Dec - 04 Jan	Porter Airlines (Canada) Ltd
25 Dec - 01 Jan	Porter Airlines (Canada) Ltd
24 Dec - 06 Jan	Air France
25 Dec - 03 Jan	Air Canada

Also check the deals for one-way flights from Montreal to Seoul 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 Seoul in December from 733€

Return flights