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

Return flights

08 May - 24 May	WestJet
25 May - 08 Jun	WestJet
14 May - 12 Jun	WestJet
17 May - 14 Jun	WestJet
28 May - 21 Jun	WestJet
01 May - 04 Jun	WestJet
06 May - 17 May	WestJet
02 May - 16 May	WestJet
01 May - 20 May	Flair Airlines
21 May - 15 Jun	WestJet
03 May - 10 May	WestJet
02 May - 26 May	WestJet
02 May - 30 May	WestJet
01 May - 26 May	WestJet
01 May - 09 May	WestJet
01 May - 31 May	WestJet
19 May - 19 Jun	WestJet
07 May - 01 Jun	WestJet

Also check the deals for one-way flights from Waterloo 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 Waterloo to Seoul in May from $830

Return flights