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

Return flights

26 May - 16 Jun	WestJet
12 May - 02 Jun	Cathay Pacific
26 May - 18 Jun	WestJet
13 May - 19 May	Turkish Airlines
26 May - 09 Jun	Spirit Airlines
14 May - 27 May	Turkish Airlines
19 May - 03 Jun	WestJet
12 May - 16 Jun	Cathay Pacific
19 May - 15 Jun	WestJet
23 May - 31 May	WestJet
22 May - 07 Jun	Alaska Airlines
17 May - 05 Jun	Alaska Airlines
12 May - 16 Jun	Korean Air	direct
14 May - 27 May	Delta	direct
13 May - 19 May	Delta	direct
23 May - 31 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 873€

Return flights