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

Return flights

02 Dec - 04 Dec	Ryanair
10 Dec - 15 Dec	KLM
11 Dec - 15 Dec	KLM
24 Dec - 06 Jan	Wizz Air
09 Dec - 16 Dec	Ryanair
01 Dec - 06 Dec	Wizz Air
09 Dec - 11 Dec	Ryanair
09 Dec - 17 Dec	Ryanair
10 Dec - 17 Dec	Ryanair
03 Dec - 05 Dec	Wizz Air
22 Dec - 07 Jan	Wizz Air
02 Dec - 05 Dec	easyJet
24 Dec - 01 Jan	Wizz Air
22 Dec - 01 Jan	Wizz Air
24 Dec - 05 Jan	Wizz Air
23 Dec - 01 Jan	Ryanair
20 Dec - 05 Jan	Ryanair
25 Dec - 10 Jan	Wizz Air
31 Dec - 07 Jan	LOT
31 Dec - 06 Jan	Ryanair

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 212€

Return flights