AirHint found the following cheapest return flights from Trivandrum (TRV) to Istanbul (IST) in December 2025 (see full year).
Return flights
| 29 Dec - 10 Jan | IndiGo | ||
| 28 Dec - 05 Jan | IndiGo | ||
| 06 Dec - 13 Dec | IndiGo | ||
| 12 Dec - 22 Dec | Oman Air |
Also check the deals for one-way flights from Trivandrum to Istanbul in December.
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