AirHint found the following cheapest return flights from Warsaw (WMI) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 08 Sep - 20 Sep | Ryanair | ||
| 15 Sep - 21 Sep | Ryanair | ||
| 22 Sep - 27 Sep | Ryanair | ||
| 23 Sep - 29 Sep | Ryanair | ||
| 17 Sep - 30 Sep | Ryanair | ||
| 25 Sep - 10 Oct | Ryanair | ||
| 01 Sep - 08 Sep | Ryanair |
Also check the deals for one-way flights from Warsaw to Keflavik in September.
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