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

Return flights

04 Dec - 12 Dec	Transavia France
02 Dec - 10 Dec	easyJet
18 Dec - 01 Jan	easyJet
18 Dec - 02 Jan	easyJet
18 Dec - 03 Jan	easyJet
01 Dec - 01 Jan	easyJet
20 Dec - 03 Jan	easyJet
20 Dec - 02 Jan	easyJet
11 Dec - 14 Dec	Transavia France
18 Dec - 28 Dec	easyJet
13 Dec - 03 Jan	SWISS
13 Dec - 03 Jan	Icelandair	direct
01 Dec - 01 Jan	Icelandair	direct
21 Dec - 28 Dec	easyJet
11 Dec - 14 Dec	Icelandair	direct
18 Dec - 01 Jan	Icelandair	direct
18 Dec - 28 Dec	Icelandair	direct
21 Dec - 28 Dec	Icelandair	direct

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

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 Keflavik to Berlin in December from 170€

Return flights