Cheapest return FRA–KEF flights, September

AirHint found the following cheapest return flights from Frankfurt (FRA) to Keflavik (KEF) in September 2026 (see full year).

Return flights

23 Sep - 07 Oct Ryanair
25 Sep - 04 Oct Ryanair
29 Sep - 13 Oct LOT
30 Sep - 04 Oct LOT
10 Sep - 21 Sep KLM
02 Sep - 30 Sep Icelandair direct
06 Sep - 14 Sep easyJet
02 Sep - 09 Sep KLM
14 Sep - 21 Sep Ryanair
15 Sep - 20 Sep LOT
10 Sep - 19 Sep LOT
12 Sep - 17 Sep Lufthansa
26 Sep - 28 Sep LOT
06 Sep - 15 Sep easyJet
19 Sep - 03 Oct Lufthansa direct
18 Sep - 08 Oct Lufthansa direct
18 Sep - 03 Oct Lufthansa direct
20 Sep - 03 Oct Lufthansa direct
29 Sep - 13 Oct Icelandair direct
30 Sep - 04 Oct Icelandair direct

Also check the deals for one-way flights from Frankfurt to Keflavik in September.

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