AirHint found the following cheapest return flights from Seoul (GMP) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 14 Sep - 21 Sep | Korean Air | ||
| 04 Sep - 13 Sep | Korean Air | ||
| 02 Sep - 12 Sep | Korean Air | ||
| 03 Sep - 12 Sep | Korean Air | ||
| 02 Sep - 15 Sep | Xiamen Airlines | ||
| 07 Sep - 22 Sep | Asiana Airlines | ||
| 24 Sep - 08 Oct | Peach |
Also check the deals for one-way flights from Seoul to Keflavik in September.
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