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

Return flights

28 Aug - 30 Sep	WestJet
21 Aug - 31 Aug	WestJet
29 Aug - 14 Sep	WestJet
14 Aug - 18 Sep	WestJet
21 Aug - 24 Aug	WestJet
17 Aug - 16 Sep	WestJet
30 Aug - 14 Sep	WestJet
21 Aug - 25 Aug	WestJet
31 Aug - 17 Sep	WestJet
23 Aug - 31 Aug	WestJet
03 Aug - 31 Aug	WestJet
20 Aug - 31 Aug	WestJet
17 Aug - 05 Sep	WestJet
08 Aug - 05 Sep	WestJet
18 Aug - 25 Aug	WestJet
16 Aug - 14 Sep	WestJet
10 Aug - 30 Sep	WestJet
21 Aug - 27 Aug	WestJet
18 Aug - 24 Aug	WestJet
22 Aug - 24 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 678€

Return flights