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

Return flights

11 Sep - 15 Sep	WestJet
05 Sep - 14 Sep	WestJet
12 Sep - 11 Oct	WestJet
05 Sep - 10 Oct	WestJet
06 Sep - 14 Sep	WestJet
02 Sep - 11 Oct	WestJet
04 Sep - 14 Sep	WestJet
05 Sep - 26 Oct	WestJet
30 Sep - 07 Oct	Air Canada
09 Sep - 16 Oct	WestJet
03 Sep - 23 Sep	WestJet
07 Sep - 14 Sep	WestJet
08 Sep - 17 Oct	WestJet
04 Sep - 28 Sep	WestJet
11 Sep - 18 Sep	WestJet
07 Sep - 06 Oct	WestJet
06 Sep - 15 Sep	American Airlines
17 Sep - 25 Sep	American Airlines
17 Sep - 16 Oct	WestJet
25 Sep - 13 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 609€

Return flights