AirHint found the following cheapest return flights from Istanbul (IST) to Lisbon (LIS) in December 2026 (see full year).
Return flights
| 11 Dec - 13 Dec | Lufthansa | ||
| 04 Dec - 06 Dec | Wizz Air | ||
| 26 Dec - 04 Jan | KLM | ||
| 04 Dec - 06 Dec | Turkish Airlines | direct | |
| 11 Dec - 13 Dec | Turkish Airlines | direct | |
| 26 Dec - 04 Jan | Turkish Airlines | direct |
Also check the deals for one-way flights from Istanbul to Lisbon in December.
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