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

Return flights

30 Sep - 06 Oct	easyJet
23 Sep - 06 Oct	easyJet
10 Sep - 23 Sep	Wizz Air
11 Sep - 24 Sep	Norwegian
22 Sep - 01 Oct	Wizz Air Malta
09 Sep - 14 Sep	easyJet
02 Sep - 14 Sep	easyJet
11 Sep - 14 Sep	Vueling Airlines
12 Sep - 17 Sep	Wizz Air Malta
02 Sep - 08 Oct	easyJet
27 Sep - 05 Oct	easyJet
17 Sep - 24 Sep	Wizz Air Malta
16 Sep - 23 Sep	Wizz Air Malta
09 Sep - 17 Sep	Wizz Air Malta
26 Sep - 03 Oct	easyJet
23 Sep - 11 Oct	easyJet
08 Sep - 14 Sep	easyJet
30 Sep - 07 Oct	easyJet
29 Sep - 05 Oct	easyJet
28 Sep - 06 Oct	easyJet

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 $215

Return flights