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

Return flights

28 Dec - 05 Jan	LOT
23 Dec - 05 Jan	LOT
14 Dec - 20 Dec	LOT
13 Dec - 20 Dec	Lufthansa	direct
23 Dec - 03 Jan	LOT
14 Dec - 20 Dec	Icelandair	direct
20 Dec - 31 Dec	Lufthansa
27 Dec - 03 Jan	Lufthansa	direct
22 Dec - 29 Dec	Lufthansa	direct
21 Dec - 28 Dec	Icelandair
21 Dec - 25 Dec	Icelandair
27 Dec - 05 Jan	Lufthansa	direct
21 Dec - 02 Jan	Ryanair
27 Dec - 02 Jan	Lufthansa
26 Dec - 02 Jan	Lufthansa
23 Dec - 02 Jan	Icelandair
23 Dec - 30 Dec	Scandinavian Airlines
23 Dec - 04 Jan	Scandinavian Airlines

Also check the deals for one-way flights from Frankfurt to Keflavik 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 Frankfurt to Keflavik in December from 307€

Return flights