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

Return flights

07 Dec - 13 Dec	LOT
23 Dec - 31 Dec	LOT
26 Dec - 05 Jan	LOT
31 Dec - 04 Jan	Icelandair	direct
30 Dec - 07 Jan	Icelandair	direct
26 Dec - 30 Dec	LOT
30 Dec - 02 Jan	Condor
25 Dec - 30 Dec	Icelandair	direct
23 Dec - 31 Dec	Icelandair	direct
26 Dec - 02 Jan	LOT
26 Dec - 05 Jan	Icelandair	direct
24 Dec - 27 Dec	Lufthansa
29 Dec - 02 Jan	Icelandair	direct
28 Dec - 03 Jan	Lufthansa
30 Dec - 02 Jan	Icelandair	direct

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 280€

Return flights