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

Return flights

17 Sep - 23 Sep	Ryanair
30 Sep - 08 Oct	Wizz Air
19 Sep - 23 Sep	Ryanair
29 Sep - 05 Oct	easyJet
21 Sep - 24 Sep	KLM
30 Sep - 09 Oct	Wizz Air
28 Sep - 02 Oct	Ryanair
19 Sep - 02 Oct	Ryanair
17 Sep - 21 Sep	Transavia France
10 Sep - 16 Sep	Ryanair
17 Sep - 22 Sep	Ryanair
18 Sep - 24 Sep	Ryanair
24 Sep - 29 Sep	easyJet
16 Sep - 24 Sep	Ryanair
25 Sep - 06 Oct	Ryanair
26 Sep - 10 Oct	Ryanair
30 Sep - 04 Oct	Wizz Air
28 Sep - 05 Oct	easyJet
24 Sep - 30 Sep	Ryanair
26 Sep - 06 Oct	Ryanair

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 $258

Return flights