AirHint found the following cheapest return flights from Nashville (BNA) to Istanbul (IST) in December 2025 (see full year).
Return flights
| 28 Dec - 08 Jan | British Airways | ||
| 10 Dec - 14 Jan | Delta | ||
| 03 Dec - 13 Dec | Icelandair | ||
| 10 Dec - 31 Dec | Spirit Airlines | ||
| 24 Dec - 01 Jan | Air Canada |
Also check the deals for one-way flights from Nashville to Istanbul in December.
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