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

Return flights

29 Aug - 12 Sep	WestJet
14 Aug - 11 Sep	WestJet
21 Aug - 24 Aug	WestJet
13 Aug - 10 Sep	WestJet
06 Aug - 02 Sep	WestJet
24 Aug - 31 Aug	WestJet
25 Aug - 08 Sep	WestJet
22 Aug - 12 Sep	WestJet
21 Aug - 14 Sep	WestJet
28 Aug - 11 Sep	WestJet
08 Aug - 01 Sep	WestJet
15 Aug - 07 Sep	WestJet
22 Aug - 24 Aug	WestJet
17 Aug - 24 Aug	WestJet
15 Aug - 24 Aug	WestJet
10 Aug - 22 Aug	WestJet
04 Aug - 25 Aug	WestJet
13 Aug - 25 Aug	WestJet
29 Aug - 31 Aug	WestJet
01 Aug - 22 Aug	WestJet

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

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 August from $889

Return flights