AirHint found the following cheapest return flights from Nantes (NTE) to Seoul (ICN) in December 2025 (see full year).
Return flights
| 04 Dec - 07 Dec | Ryanair | ||
| 20 Dec - 23 Dec | Volotea | ||
| 28 Dec - 20 Jan | KLM | ||
| 19 Dec - 04 Jan | easyJet |
Also check the deals for one-way flights from Nantes to Seoul in December.
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