AirHint found the following cheapest return flights from Nashville (BNA) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 25 Sep - 30 Sep | Icelandair | direct | |
| 24 Sep - 29 Sep | jetBlue | ||
| 09 Sep - 16 Sep | Icelandair | direct | |
| 02 Sep - 09 Sep | Icelandair | direct | |
| 11 Sep - 18 Sep | Icelandair | direct | |
| 10 Sep - 17 Sep | KLM | ||
| 01 Sep - 08 Sep | KLM |
Also check the deals for one-way flights from Nashville to Keflavik in September.
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