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

Return flights

02 Dec - 05 Dec	easyJet
09 Dec - 12 Dec	easyJet
09 Dec - 13 Dec	easyJet
01 Dec - 05 Dec	easyJet
02 Dec - 09 Dec	easyJet
02 Dec - 06 Dec	easyJet
06 Dec - 09 Dec	easyJet
08 Dec - 15 Dec	Wizz Air Malta
06 Dec - 10 Dec	easyJet
06 Dec - 13 Dec	easyJet
26 Dec - 07 Jan	Wizz Air
26 Dec - 01 Jan	Wizz Air
31 Dec - 09 Jan	easyJet
26 Dec - 06 Jan	Wizz Air
31 Dec - 05 Jan	Vueling Airlines
23 Dec - 01 Jan	easyJet
31 Dec - 06 Jan	Vueling Airlines
31 Dec - 04 Jan	LOT
25 Dec - 01 Jan	Wizz Air
24 Dec - 01 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 $169

Return flights