AirHint found the following cheapest return flights from Houston (IAH) to Istanbul (IST) in December 2026 (see full year).
Return flights
| 28 Dec - 06 Jan | KLM | ||
| 05 Dec - 18 Dec | Lufthansa | ||
| 05 Dec - 18 Dec | Turkish Airlines | direct | |
| 28 Dec - 06 Jan | Turkish Airlines | direct |
Also check the deals for one-way flights from Houston to Istanbul in December.
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