AirHint found the following cheapest return flights from Washington (IAD) to Keflavik (KEF) in April 2026 (see full year).
Return flights
| 04 Apr - 12 Apr | Icelandair | direct | |
| 15 Apr - 22 Apr | Scandinavian Airlines | ||
| 01 Apr - 05 Apr | Icelandair | direct | |
| 13 Apr - 20 Apr | Scandinavian Airlines | ||
| 12 Apr - 19 Apr | Delta |
Also check the deals for one-way flights from Washington to Keflavik in April.
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