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

Return flights

12 Mar - 23 Mar	Cathay Pacific
11 Mar - 20 Mar	Cathay Pacific
13 Mar - 20 Mar	Turkish Airlines
30 Mar - 10 Apr	Turkish Airlines
13 Mar - 22 Mar	EVA Air
13 Mar - 21 Mar	Turkish Airlines
25 Mar - 01 Apr	Turkish Airlines
25 Mar - 08 Apr	Turkish Airlines
02 Mar - 09 Apr	Air Canada
02 Mar - 13 Apr	Air Canada
02 Mar - 14 Apr	Air Canada
02 Mar - 15 Apr	Air Canada
03 Mar - 15 Apr	Air Canada
04 Mar - 15 Apr	Air Canada
02 Mar - 10 Apr	Air Canada
12 Mar - 23 Mar	Delta	direct
11 Mar - 20 Mar	Delta	direct
13 Mar - 22 Mar	Korean Air	direct
13 Mar - 20 Mar	Delta	direct
13 Mar - 21 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 767€

Return flights