AirHint found the following cheapest return flights from Berlin (BER) to Keflavik (KEF) in September 2025 (see full year).

Return flights

30 Sep - 07 Oct	Wizz Air
17 Sep - 23 Sep	Ryanair
30 Sep - 05 Oct	Wizz Air
19 Sep - 24 Sep	Ryanair
13 Sep - 23 Sep	Ryanair
24 Sep - 01 Oct	Ryanair
30 Sep - 06 Oct	Wizz Air
11 Sep - 16 Sep	Wizz Air
09 Sep - 17 Sep	Norwegian Air Sweden AOC
24 Sep - 29 Sep	easyJet
29 Sep - 05 Oct	easyJet
26 Sep - 06 Oct	Ryanair
18 Sep - 20 Sep	easyJet
19 Sep - 23 Sep	Ryanair
24 Sep - 02 Oct	Ryanair
26 Sep - 04 Oct	Ryanair
18 Sep - 26 Sep	easyJet
12 Sep - 29 Sep	easyJet
27 Sep - 04 Oct	easyJet
29 Sep - 06 Oct	Norwegian Air Sweden AOC

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

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Berlin to Keflavik in September from 172€

Return flights