AirHint found the following cheapest return flights from Toronto (YYZ) to Seoul (ICN) in September 2025 (see full year).

Return flights

29 Sep - 11 Oct	WestJet
10 Sep - 21 Sep	WestJet
13 Sep - 17 Oct	Porter Airlines (Canada) Ltd
15 Sep - 22 Sep	WestJet
05 Sep - 21 Sep	WestJet
30 Sep - 09 Oct	WestJet
30 Sep - 11 Oct	WestJet
29 Sep - 19 Oct	WestJet
12 Sep - 17 Oct	WestJet
11 Sep - 21 Sep	Flair Airlines
18 Sep - 23 Oct	WestJet
17 Sep - 16 Oct	WestJet
15 Sep - 17 Oct	WestJet
25 Sep - 16 Oct	WestJet
02 Sep - 05 Sep	American Airlines
09 Sep - 18 Sep	WestJet
04 Sep - 25 Sep	WestJet
13 Sep - 20 Sep	Porter Airlines (Canada) Ltd
10 Sep - 20 Sep	WestJet
15 Sep - 25 Sep	WestJet

Also check the deals for one-way flights from Toronto to Seoul in September.

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 Toronto to Seoul in September from $694

Return flights