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

Return flights

03 Mar - 14 Mar	Cathay Pacific
07 Mar - 14 Mar	Cathay Pacific
16 Mar - 01 Apr	Cathay Pacific
31 Mar - 23 Apr	Hawaiian Airlines
13 Mar - 22 Mar	Cathay Pacific
11 Mar - 22 Mar	Hawaiian Airlines
31 Mar - 10 Apr	Turkish Airlines
31 Mar - 07 Apr	Turkish Airlines
28 Mar - 08 Apr	Air Canada
13 Mar - 23 Mar	Alaska Airlines
31 Mar - 23 Apr	Delta	direct
31 Mar - 07 Apr	Delta	direct
16 Mar - 01 Apr	Delta	direct
11 Mar - 22 Mar	Delta	direct
31 Mar - 10 Apr	Delta	direct
03 Mar - 14 Mar	Delta	direct
13 Mar - 23 Mar	Delta	direct
28 Mar - 08 Apr	Delta	direct
07 Mar - 14 Mar	Korean Air	direct
13 Mar - 22 Mar	Delta	direct

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

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 March from 803€

Return flights