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

Return flights

02 Apr - 11 Apr	Air Canada
03 Apr - 17 Apr	Turkish Airlines
16 Apr - 30 Apr	EVA Air
03 Apr - 11 Apr	Air Canada
16 Apr - 30 Apr	Delta	direct
02 Apr - 11 Apr	Delta	direct
03 Apr - 11 Apr	Delta	direct
03 Apr - 17 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 968€

Return flights