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

Return flights

02 Dec - 09 Dec	easyJet
17 Dec - 07 Jan	Wizz Air
02 Dec - 06 Dec	easyJet
03 Dec - 11 Dec	Wizz Air
05 Dec - 10 Dec	Wizz Air
02 Dec - 05 Dec	easyJet
18 Dec - 07 Jan	Wizz Air
07 Dec - 09 Dec	Ryanair
03 Dec - 10 Dec	Wizz Air
10 Dec - 15 Dec	KLM
11 Dec - 15 Dec	KLM
08 Dec - 15 Dec	KLM
19 Dec - 01 Jan	Wizz Air
22 Dec - 07 Jan	Wizz Air
18 Dec - 01 Jan	Ryanair
31 Dec - 13 Jan	Aeroitalia
22 Dec - 01 Jan	Wizz Air
22 Dec - 04 Jan	Wizz Air
21 Dec - 01 Jan	Ryanair
24 Dec - 04 Jan	Wizz Air

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 $200

Return flights