AirHint found the following cheapest one-way flights from Toronto (YTZ) to Seoul (ICN) in September 2025 (see full year).

One-Way flights

03 Sep	Porter Airlines (Canada) Ltd
09 Sep	Porter Airlines (Canada) Ltd
23 Sep	Porter Airlines (Canada) Ltd
16 Sep	Porter Airlines (Canada) Ltd
18 Sep	Porter Airlines (Canada) Ltd
10 Sep	Porter Airlines (Canada) Ltd
30 Sep	Porter Airlines (Canada) Ltd
24 Sep	Porter Airlines (Canada) Ltd
07 Sep	Porter Airlines (Canada) Ltd
27 Sep	Porter Airlines (Canada) Ltd

Also check the deals for return 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 one-way flights from Toronto to Seoul in September from 422€

One-Way flights