AirHint found the following cheapest return flights from Sao Paulo (GRU) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 06 Sep - 15 Sep | United | ||
| 25 Sep - 09 Oct | Air China | ||
| 01 Sep - 10 Sep | Arajet | ||
| 25 Sep - 02 Oct | Air China |
Also check the deals for one-way flights from Sao Paulo to Keflavik in September.
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