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

Return flights

06 Sep - 13 Sep	Wizz Air
30 Sep - 08 Oct	Wizz Air Malta
06 Sep - 16 Sep	Wizz Air
24 Sep - 28 Sep	Wizz Air
03 Sep - 13 Sep	Wizz Air
25 Sep - 28 Sep	Wizz Air Malta
02 Sep - 09 Sep	Wizz Air Malta
11 Sep - 17 Sep	Wizz Air
13 Sep - 23 Sep	Wizz Air Malta
20 Sep - 25 Sep	Vueling Airlines
22 Sep - 28 Sep	Wizz Air Malta
30 Sep - 05 Oct	Vueling Airlines
20 Sep - 03 Oct	Ryanair
26 Sep - 03 Oct	Ryanair
24 Sep - 01 Oct	Wizz Air
23 Sep - 02 Oct	easyJet
29 Sep - 02 Oct	Wizz Air Malta
15 Sep - 01 Oct	Wizz Air Malta
12 Sep - 01 Oct	Wizz Air
26 Sep - 07 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 182€

Return flights