AirHint found the following cheapest return flights from Newcastle (NCL) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 27 Sep - 29 Sep | Ryanair | ||
| 26 Sep - 29 Sep | Ryanair | ||
| 25 Sep - 29 Sep | Lufthansa | ||
| 27 Sep - 04 Oct | KLM | ||
| 18 Sep - 25 Sep | Lufthansa |
Also check the deals for one-way flights from Newcastle to Keflavik in September.
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