AirHint found the following cheapest return flights from Toronto (YYZ) to Seoul (ICN) in May 2026 (see full year).

Return flights

10 May - 22 May	Flair Airlines
24 May - 04 Jun	Flair Airlines
14 May - 28 May	Flair Airlines
05 May - 21 May	Flair Airlines
01 May - 21 May	Flair Airlines
25 May - 08 Jun	Flair Airlines
21 May - 04 Jun	WestJet
08 May - 17 May	Flair Airlines
01 May - 31 May	Flair Airlines
13 May - 21 May	WestJet
10 May - 01 Jun	WestJet
21 May - 11 Jun	WestJet
01 May - 14 May	WestJet
17 May - 30 May	WestJet
07 May - 01 Jun	WestJet
15 May - 31 May	WestJet
10 May - 30 Jun	WestJet
10 May - 30 Jun	Korean Air	direct
24 May - 04 Jun	Korean Air	direct
10 May - 01 Jun	Korean Air	direct

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

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 May from $808

Return flights