AirHint found the following cheapest one-way flights from Washington (IAD) to Istanbul (IST) in December 2025 (see full year).
One-Way flights
| 02 Dec | TAP | ||
| 08 Dec | TAP | ||
| 04 Dec | TAP | ||
| 09 Dec | TAP | ||
| 05 Dec | TAP | ||
| 06 Dec | TAP | ||
| 15 Dec | Frontier Airlines | ||
| 10 Dec | Scandinavian Airlines | ||
| 30 Dec | Air Canada | ||
| 02 Dec | IndiGo | direct |
Also check the deals for return flights from Washington to Istanbul in December.
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