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

Return flights

03 Dec - 08 Dec	Wizz Air
01 Dec - 08 Dec	Wizz Air
04 Dec - 14 Dec	Vueling Airlines
10 Dec - 15 Dec	Wizz Air
09 Dec - 15 Dec	Wizz Air Malta
08 Dec - 15 Dec	Wizz Air
03 Dec - 13 Dec	Wizz Air
08 Dec - 13 Dec	Wizz Air
10 Dec - 16 Dec	Wizz Air Malta
02 Dec - 08 Dec	Wizz Air Malta
31 Dec - 04 Jan	Ryanair
30 Dec - 06 Jan	Lufthansa
26 Dec - 06 Jan	Wizz Air
30 Dec - 02 Jan	Scandinavian Airlines
29 Dec - 01 Jan	Wizz Air
26 Dec - 03 Jan	Wizz Air
28 Dec - 01 Jan	Lufthansa
27 Dec - 11 Jan	Vueling Airlines
28 Dec - 07 Jan	Ryanair
28 Dec - 02 Jan	Lufthansa

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.

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Cheapest return flights from Rome to Keflavik in December from $252

Return flights