AirHint found the following cheapest one-way flights from Washington (IAD) to Istanbul (IST) in October 2025 (see full year).
One-Way flights
| 24 Oct | TAP | ||
| 23 Oct | TAP | ||
| 22 Oct | TAP | ||
| 25 Oct | TAP | ||
| 29 Oct | Frontier Airlines | ||
| 30 Oct | Saudia | ||
| 28 Oct | Saudia | ||
| 30 Oct | Turkish Airlines | direct | |
| 22 Oct | Turkish Airlines | direct | |
| 29 Oct | Turkish Airlines | direct |
Also check the deals for return flights from Washington to Istanbul in October.
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