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

Return flights

08 Apr - 22 Apr	Turkish Airlines
03 Apr - 10 Apr	Turkish Airlines
05 Apr - 12 Apr	Finnair
29 Apr - 09 May	Turkish Airlines
04 Apr - 11 Apr	Hawaiian Airlines
08 Apr - 22 Apr	Delta	direct
29 Apr - 09 May	Delta	direct
03 Apr - 10 Apr	Delta	direct
05 Apr - 12 Apr	Delta	direct
04 Apr - 11 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 935€

Return flights