AirHint found the following cheapest return flights from Kolkata (CCU) to Istanbul (IST) in December 2025 (see full year).
Return flights
| 21 Dec - 28 Dec | IndiGo | ||
| 22 Dec - 29 Dec | IndiGo | ||
| 20 Dec - 26 Dec | IndiGo | ||
| 20 Dec - 30 Dec | IndiGo | ||
| 20 Dec - 29 Dec | Emirates | ||
| 29 Dec - 03 Jan | flydubai | ||
| 30 Dec - 04 Jan | IndiGo |
Also check the deals for one-way flights from Kolkata to Istanbul in December.
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