AirHint found the following cheapest return flights from Hamilton (YHM) to Seoul (ICN) in September 2025 (see full year).

Return flights

17 Sep - 16 Oct	WestJet
07 Sep - 16 Oct	WestJet
18 Sep - 25 Sep	WestJet
17 Sep - 12 Oct	WestJet
06 Sep - 16 Oct	WestJet
17 Sep - 18 Oct	WestJet
07 Sep - 14 Sep	WestJet
08 Sep - 15 Sep	WestJet
29 Sep - 19 Oct	WestJet
14 Sep - 16 Oct	WestJet
11 Sep - 16 Oct	WestJet
11 Sep - 13 Oct	WestJet
08 Sep - 21 Sep	WestJet
11 Sep - 14 Sep	WestJet
08 Sep - 14 Sep	WestJet
15 Sep - 29 Sep	WestJet
05 Sep - 12 Sep	WestJet
17 Sep - 23 Oct	WestJet
14 Sep - 21 Sep	WestJet
19 Sep - 21 Sep	WestJet

Also check the deals for one-way flights from Hamilton 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 return flights from Hamilton to Seoul in September from $693

Return flights