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

Return flights

05 Dec - 09 Dec	easyJet
06 Dec - 10 Dec	Ryanair
04 Dec - 11 Dec	Ryanair
22 Dec - 28 Dec	Ryanair
31 Dec - 06 Jan	easyJet
05 Dec - 08 Dec	ITA Airways
25 Dec - 06 Jan	easyJet
02 Dec - 09 Dec	Ryanair
25 Dec - 31 Dec	easyJet
29 Dec - 03 Jan	Ryanair
31 Dec - 04 Jan	easyJet
26 Dec - 02 Jan	Ryanair
27 Dec - 29 Dec	Transavia France
23 Dec - 27 Dec	Iberia Express
26 Dec - 03 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 $273

Return flights