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

21 Sep - 24 Sep Ryanair
23 Sep - 07 Oct Ryanair
25 Sep - 04 Oct Ryanair
14 Sep - 19 Sep Ryanair
13 Sep - 23 Sep LOT
13 Sep - 28 Sep LOT
29 Sep - 13 Oct LOT
30 Sep - 04 Oct LOT
09 Sep - 20 Sep Ryanair
14 Sep - 24 Sep Ryanair
04 Sep - 13 Sep easyJet
09 Sep - 19 Sep Ryanair
08 Sep - 21 Sep Icelandair direct
02 Sep - 30 Sep Icelandair direct
21 Sep - 04 Oct easyJet
18 Sep - 08 Oct Lufthansa direct
18 Sep - 03 Oct Lufthansa direct
29 Sep - 13 Oct Icelandair direct
30 Sep - 04 Oct Icelandair direct
21 Sep - 04 Oct Lufthansa direct

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

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