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

Return flights

28 Aug - 04 Sep	WestJet
19 Aug - 24 Sep	Air Canada	direct
11 Aug - 01 Sep	WestJet
30 Aug - 07 Sep	WestJet
21 Aug - 05 Sep	WestJet
31 Aug - 07 Sep	WestJet
30 Aug - 05 Sep	WestJet
11 Aug - 10 Sep	WestJet
17 Aug - 11 Sep	WestJet
30 Aug - 06 Sep	WestJet
05 Aug - 26 Aug	WestJet
12 Aug - 26 Aug	WestJet
20 Aug - 27 Aug	WestJet
19 Aug - 26 Aug	WestJet
21 Aug - 28 Aug	WestJet
16 Aug - 23 Aug	WestJet
18 Aug - 25 Aug	Porter Airlines (Canada) Ltd
22 Aug - 29 Aug	WestJet
25 Aug - 27 Aug	Air Canada	direct
24 Aug - 31 Aug	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Montreal to Seoul in August.

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 August from 738€

Return flights