AirHint found the following cheapest return flights from Chicago (ORD) to Seoul (ICN) in February 2026 (see full year).
Return flights
| 01 Feb - 02 Mar | Frontier Airlines | ||
| 08 Feb - 15 Feb | Cathay Pacific | ||
| 01 Feb - 02 Mar | Korean Air | direct | |
| 08 Feb - 15 Feb | Delta | direct |
Also check the deals for one-way flights from Chicago to Seoul in February.
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