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

Return flights

23 May - 14 Jun	WestJet
23 May - 31 May	WestJet
19 May - 26 May	WestJet
19 May - 31 May	WestJet
22 May - 06 Jun	WestJet
22 May - 07 Jun	WestJet
18 May - 29 May	WestJet
06 May - 21 May	Turkish Airlines
30 May - 15 Jun	WestJet
16 May - 25 May	Air Canada
16 May - 08 Jun	Air Canada
20 May - 30 Jun	WestJet
15 May - 31 May	EVA Air
15 May - 23 May	EVA Air
08 May - 14 May	Cathay Pacific
25 May - 11 Jun	Finnair
31 May - 26 Jun	Finnair
25 May - 11 Jun	Delta	direct
20 May - 30 Jun	Delta	direct
19 May - 26 May	Delta	direct

Also check the deals for one-way flights from Chicago 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 Chicago to Seoul in May from $888

Return flights