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

Return flights

11 Dec - 14 Dec	KLM
11 Dec - 17 Dec	KLM
31 Dec - 06 Jan	Vueling Airlines
23 Dec - 28 Dec	Volotea
05 Dec - 07 Dec	Vueling Airlines
30 Dec - 05 Jan	Scandinavian Airlines
30 Dec - 06 Jan	Scandinavian Airlines
26 Dec - 04 Jan	ITA Airways
27 Dec - 01 Jan	ITA Airways
24 Dec - 04 Jan	Vueling Airlines
30 Dec - 04 Jan	Scandinavian Airlines
29 Dec - 01 Jan	Scandinavian Airlines
28 Dec - 02 Jan	Lufthansa

Also check the deals for one-way flights from Florence 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 Florence to Keflavik in December from 185€

Return flights