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

Return flights

20 Apr - 06 May	Cathay Pacific
16 Apr - 27 Apr	Cathay Pacific
20 Apr - 12 May	Cathay Pacific
10 Apr - 26 Apr	Cathay Pacific
14 Apr - 05 May	Turkish Airlines
20 Apr - 05 May	Turkish Airlines
09 Apr - 19 Apr	Cathay Pacific
17 Apr - 28 Apr	Turkish Airlines
02 Apr - 25 Apr	Turkish Airlines
12 Apr - 26 Apr	LOT
20 Apr - 06 May	Korean Air	direct
16 Apr - 27 Apr	Delta	direct
14 Apr - 05 May	Delta	direct
20 Apr - 05 May	Delta	direct
20 Apr - 12 May	Delta	direct
02 Apr - 25 Apr	Delta	direct
09 Apr - 19 Apr	Delta	direct
17 Apr - 28 Apr	Delta	direct

Also check the deals for one-way flights from Chicago to Seoul in April.

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 April from 760€

Return flights