AirHint found the following cheapest return flights from Rome (FCO) to Keflavik (KEF) in September 2025 (see full year).

Return flights

16 Sep - 23 Sep	Wizz Air Malta
17 Sep - 23 Sep	Wizz Air
19 Sep - 21 Sep	Wizz Air
18 Sep - 23 Sep	Wizz Air
15 Sep - 23 Sep	Transavia France
30 Sep - 11 Oct	Wizz Air
23 Sep - 25 Sep	Wizz Air Malta
20 Sep - 23 Sep	Wizz Air
23 Sep - 30 Sep	Wizz Air Malta
24 Sep - 30 Sep	Wizz Air Malta
22 Sep - 06 Oct	Ryanair
12 Sep - 21 Sep	Wizz Air
29 Sep - 05 Oct	Ryanair
27 Sep - 01 Oct	Wizz Air Malta
22 Sep - 01 Oct	Transavia France
24 Sep - 01 Oct	Wizz Air Malta
25 Sep - 02 Oct	ITA Airways
29 Sep - 06 Oct	Ryanair
23 Sep - 02 Oct	Wizz Air Malta
29 Sep - 01 Oct	Wizz Air Malta

Also check the deals for one-way flights from Rome to Keflavik in September.

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 Rome to Keflavik in September from $253

Return flights