AirHint found the following cheapest return flights from Istanbul (IST) to Basel (BSL) in December 2026 (see full year).
Return flights
| 03 Dec - 06 Dec | AJet | direct | |
| 04 Dec - 06 Dec | AJet | direct | |
| 26 Dec - 09 Jan | KLM | ||
| 17 Dec - 20 Dec | Lufthansa | ||
| 11 Dec - 13 Dec | Lufthansa | ||
| 26 Dec - 09 Jan | AJet | direct | |
| 11 Dec - 13 Dec | Turkish Airlines | direct |
Also check the deals for one-way flights from Istanbul to Basel in December.
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