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

Return flights

10 Sep - 21 Sep	WestJet
01 Sep - 11 Sep	WestJet
29 Sep - 11 Oct	Flair Airlines
12 Sep - 18 Sep	WestJet
01 Sep - 18 Sep	WestJet
08 Sep - 18 Sep	WestJet
18 Sep - 24 Sep	WestJet
04 Sep - 11 Sep	WestJet
04 Sep - 22 Sep	WestJet
10 Sep - 25 Sep	WestJet
14 Sep - 18 Sep	WestJet
17 Sep - 10 Oct	WestJet
25 Sep - 23 Oct	WestJet
01 Sep - 18 Oct	WestJet
16 Sep - 20 Oct	WestJet
08 Sep - 20 Oct	WestJet
10 Sep - 09 Oct	WestJet
20 Sep - 05 Oct	Flair Airlines
20 Sep - 31 Oct	Flair Airlines
12 Sep - 11 Oct	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 $769

Return flights