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

Return flights

31 May - 07 Jun	Porter Airlines (Canada) Ltd
13 May - 28 May	Delta
04 May - 11 May	Korean Air
06 May - 21 May	Korean Air
10 May - 02 Jun	Delta
10 May - 03 Jun	Delta
12 May - 31 May	Korean Air
14 May - 07 Jun	Korean Air
10 May - 05 Jun	Delta
03 May - 10 May	Korean Air
31 May - 08 Jun	WestJet
13 May - 19 May	Korean Air
11 May - 14 May	Korean Air
25 May - 15 Jun	Korean Air
25 May - 08 Jun	Korean Air
22 May - 08 Jun	Korean Air
27 May - 19 Jun	Korean Air

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 $1405

Return flights