AirHint found the following cheapest return flights from Split (SPU) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 09 Sep - 17 Sep | Wizz Air | ||
| 09 Sep - 18 Sep | KLM | ||
| 10 Sep - 17 Sep | Norwegian Air Sweden AOC |
Also check the deals for one-way flights from Split to Keflavik in September.
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