AirHint found the following cheapest one-way flights from Washington (DCA) to Keflavik (KEF) in October 2025 (see full year).
One-Way flights
| 19 Oct | Air France | ||
| 20 Oct | Air France | ||
| 21 Oct | Air France | ||
| 22 Oct | Air France | ||
| 23 Oct | Air France | ||
| 31 Oct | Frontier Airlines | ||
| 30 Oct | jetBlue |
Also check the deals for return flights from Washington to Keflavik in October.
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