AirHint found the following cheapest return flights from Basel (BSL) to Seoul (ICN) in December 2025 (see full year).
Return flights
| 30 Dec - 27 Jan | Pegasus Airlines | ||
| 25 Dec - 08 Jan | easyJet | ||
| 25 Dec - 10 Jan | easyJet | ||
| 20 Dec - 17 Jan | easyJet | ||
| 23 Dec - 30 Dec | Ryanair |
Also check the deals for one-way flights from Basel to Seoul in December.
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