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

Return flights

13 Dec - 16 Dec	easyJet
10 Dec - 16 Dec	easyJet
01 Dec - 05 Dec	Ryanair
12 Dec - 16 Dec	easyJet
03 Dec - 06 Dec	easyJet
03 Dec - 10 Dec	easyJet
10 Dec - 13 Dec	easyJet
31 Dec - 08 Jan	easyJet
03 Dec - 08 Dec	Fly One
08 Dec - 13 Dec	Ryanair
07 Dec - 16 Dec	easyJet
21 Dec - 01 Jan	Wizz Air Malta
22 Dec - 01 Jan	Wizz Air Malta
24 Dec - 01 Jan	Wizz Air
23 Dec - 01 Jan	easyJet
25 Dec - 06 Jan	Wizz Air
25 Dec - 04 Jan	Wizz Air
25 Dec - 03 Jan	Wizz Air
25 Dec - 05 Jan	Wizz Air
30 Dec - 06 Jan	easyJet

Also check the deals for one-way flights from Naples 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 Naples to Keflavik in December from $189

Return flights