AirHint found the following cheapest return flights from Madison (MSN) to Seoul (ICN) in December 2025 (see full year).
Return flights
| 24 Dec - 12 Jan | American Airlines | ||
| 26 Dec - 19 Jan | Delta | ||
| 09 Dec - 12 Jan | Delta | ||
| 22 Dec - 22 Jan | Delta | ||
| 18 Dec - 28 Jan | Delta | ||
| 17 Dec - 13 Jan | Delta |
Also check the deals for one-way flights from Madison to Seoul in December.
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