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

Return flights

01 Dec - 05 Dec	Vueling Airlines
03 Dec - 05 Dec	Wizz Air
04 Dec - 13 Dec	Ryanair
03 Dec - 06 Dec	easyJet
08 Dec - 13 Dec	Wizz Air Malta
01 Dec - 08 Dec	Wizz Air Malta
06 Dec - 08 Dec	Ryanair
01 Dec - 07 Dec	Vueling Airlines
12 Dec - 16 Dec	easyJet
13 Dec - 16 Dec	easyJet
22 Dec - 04 Jan	LOT
31 Dec - 04 Jan	LOT
31 Dec - 06 Jan	LOT
29 Dec - 04 Jan	LOT
31 Dec - 05 Jan	ITA Airways
27 Dec - 06 Jan	LOT
30 Dec - 04 Jan	Scandinavian Airlines
25 Dec - 01 Jan	Lufthansa
26 Dec - 07 Jan	easyJet
29 Dec - 01 Jan	LOT

Also check the deals for one-way flights from Rome 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Rome to Keflavik in December from 177€

Return flights