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

Return flights

03 Dec - 06 Dec	easyJet
03 Dec - 09 Dec	easyJet
03 Dec - 04 Dec	easyJet
01 Dec - 06 Dec	easyJet
14 Dec - 16 Dec	easyJet
03 Dec - 05 Dec	easyJet
08 Dec - 16 Dec	easyJet
03 Dec - 13 Dec	easyJet
12 Dec - 15 Dec	Ryanair
08 Dec - 12 Dec	Ryanair
31 Dec - 07 Jan	KLM
20 Dec - 01 Jan	Ryanair
25 Dec - 01 Jan	Wizz Air
24 Dec - 01 Jan	Ryanair
29 Dec - 01 Jan	Ryanair
30 Dec - 01 Jan	Ryanair
29 Dec - 05 Jan	Ryanair
30 Dec - 06 Jan	easyJet
31 Dec - 04 Jan	easyJet
26 Dec - 02 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 $169

Return flights