AirHint found the following cheapest return flights from Lisbon (LIS) to Istanbul (IST) in December 2026 (see full year).
Return flights
| 22 Dec - 27 Dec | KLM | ||
| 21 Dec - 27 Dec | KLM | ||
| 19 Dec - 24 Dec | KLM | ||
| 21 Dec - 21 Dec | Turkish Airlines | direct |
Also check the deals for one-way flights from Lisbon to Istanbul in December.
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