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
29 Sep - 12 Oct	WestJet
29 Sep - 19 Oct	WestJet
29 Sep - 14 Oct	WestJet
26 Sep - 10 Oct	Flair Airlines
25 Sep - 30 Oct	Flair Airlines
28 Sep - 30 Oct	Flair Airlines
27 Sep - 11 Oct	Flair Airlines
24 Sep - 23 Oct	Flair Airlines
27 Sep - 12 Oct	Flair Airlines
19 Sep - 23 Sep	Flair Airlines
24 Sep - 30 Sep	Flair Airlines
21 Sep - 25 Sep	Flair Airlines
21 Sep - 28 Sep	Flair Airlines
22 Sep - 30 Sep	WestJet
24 Sep - 29 Sep	Flair Airlines
17 Sep - 30 Sep	Flair Airlines
20 Sep - 28 Sep	Flair Airlines
22 Sep - 29 Sep	Flair Airlines
19 Sep - 30 Sep	Flair Airlines

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 634€

Return flights