AirHint found the following cheapest return flights from Chicago (MDW) to Seoul (ICN) in March 2026 (see full year).
Return flights
| 28 Mar - 11 Apr | Frontier Airlines | ||
| 19 Mar - 07 Apr | Delta | ||
| 25 Mar - 15 Apr | Delta | ||
| 06 Mar - 16 Mar | Delta | ||
| 21 Mar - 08 Apr | Delta | ||
| 14 Mar - 21 Mar | Delta | ||
| 20 Mar - 10 Apr | Delta | ||
| 28 Mar - 18 Apr | Delta |
Also check the deals for one-way flights from Chicago to Seoul in March.
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