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

Return flights

27 Aug - 05 Sep	Ryanair
27 Aug - 02 Sep	Ryanair
26 Aug - 05 Sep	Ryanair
28 Aug - 08 Sep	Ryanair
28 Aug - 07 Sep	Wizz Air Malta
29 Aug - 09 Sep	Ryanair
27 Aug - 07 Sep	Ryanair
29 Aug - 08 Sep	Norwegian
25 Aug - 05 Sep	Ryanair
27 Aug - 01 Sep	Ryanair
27 Aug - 31 Aug	Ryanair
20 Aug - 22 Aug	SWISS
20 Aug - 21 Aug	SWISS
26 Aug - 31 Aug	Ryanair
23 Aug - 28 Aug	easyJet
22 Aug - 27 Aug	Ryanair
25 Aug - 31 Aug	Ryanair
20 Aug - 24 Aug	SWISS
20 Aug - 27 Aug	ITA Airways
19 Aug - 23 Aug	Jet2

Also check the deals for one-way flights from Naples to Keflavik in August.

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 August from 250€

Return flights