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

Return flights

12 May - 22 May	Turkish Airlines
20 May - 03 Jun	WestJet
02 May - 16 May	Turkish Airlines
07 May - 19 May	Cathay Pacific
06 May - 21 May	Spirit Airlines
22 May - 07 Jun	WestJet
13 May - 22 Jun	Spirit Airlines
13 May - 22 May	Turkish Airlines
13 May - 28 May	Air India
25 May - 11 Jun	WestJet
21 May - 28 May	Alaska Airlines
22 May - 13 Jun	WestJet
15 May - 23 May	Alaska Airlines
21 May - 25 May	WestJet
24 May - 06 Jun	Alaska Airlines
22 May - 30 May	WestJet
30 May - 21 Jun	WestJet
30 May - 06 Jun	Alaska Airlines
30 May - 04 Jun	Alaska Airlines
30 May - 05 Jun	Alaska Airlines

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Chicago to Seoul in May from 861€

Return flights