AirHint found the following cheapest return flights from Bangkok (BKK) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 20 Sep - 30 Sep | Thai Lion Air | ||
| 07 Sep - 21 Sep | Finnair | ||
| 12 Sep - 19 Sep | Finnair | ||
| 23 Sep - 30 Sep | Etihad Airways |
Also check the deals for one-way flights from Bangkok to Keflavik in September.
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