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

Return flights

03 Dec - 09 Dec	easyJet
03 Dec - 06 Dec	easyJet
14 Dec - 16 Dec	easyJet
06 Dec - 09 Dec	easyJet
08 Dec - 16 Dec	easyJet
12 Dec - 16 Dec	Ryanair
02 Dec - 06 Dec	easyJet
12 Dec - 14 Dec	Ryanair
01 Dec - 05 Dec	Ryanair
12 Dec - 15 Dec	Ryanair
31 Dec - 07 Jan	easyJet
31 Dec - 06 Jan	easyJet
26 Dec - 23 Jan	easyJet
31 Dec - 05 Jan	Ryanair
26 Dec - 01 Jan	easyJet
29 Dec - 06 Jan	Ryanair
28 Dec - 02 Jan	Ryanair
27 Dec - 05 Jan	Ryanair
26 Dec - 02 Jan	ITA Airways
27 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 $174

Return flights