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

Return flights

18 Dec - 25 Dec	Ryanair
17 Dec - 26 Dec	Wizz Air
12 Dec - 15 Dec	Wizz Air
17 Dec - 23 Dec	Wizz Air
19 Dec - 26 Dec	Wizz Air
16 Dec - 23 Dec	Wizz Air
24 Dec - 01 Jan	Wizz Air
22 Dec - 31 Dec	Ryanair
24 Dec - 31 Dec	Wizz Air
19 Dec - 23 Dec	Wizz Air
24 Dec - 29 Dec	Wizz Air
31 Dec - 10 Jan	Ryanair
22 Dec - 07 Jan	Wizz Air
25 Dec - 01 Jan	Wizz Air
30 Dec - 08 Jan	Ryanair
23 Dec - 01 Jan	Wizz Air Malta
31 Dec - 06 Jan	Wizz Air
31 Dec - 01 Jan	Ryanair
31 Dec - 07 Jan	Wizz Air
31 Dec - 05 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 $277

Return flights