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

Return flights

30 Aug - 10 Sep	WestJet
21 Aug - 29 Aug	WestJet
28 Aug - 08 Sep	WestJet
17 Aug - 24 Aug	WestJet
29 Aug - 08 Sep	WestJet
29 Aug - 05 Sep	WestJet
28 Aug - 04 Sep	WestJet
23 Aug - 05 Sep	WestJet
25 Aug - 10 Sep	WestJet
20 Aug - 27 Aug	WestJet
22 Aug - 29 Aug	WestJet
30 Aug - 06 Sep	WestJet
18 Aug - 25 Aug	WestJet
21 Aug - 28 Aug	WestJet
23 Aug - 30 Aug	WestJet
14 Aug - 21 Aug	WestJet
15 Aug - 25 Aug	WestJet
11 Aug - 10 Sep	Porter Airlines (Canada) Ltd
19 Aug - 26 Aug	WestJet
27 Aug - 08 Sep	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 853€

Return flights