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

Return flights

30 Sep - 03 Oct	easyJet
23 Sep - 02 Oct	Wizz Air Malta
16 Sep - 23 Sep	easyJet
16 Sep - 24 Sep	easyJet
29 Sep - 03 Oct	Wizz Air Malta
24 Sep - 01 Oct	Wizz Air Malta
09 Sep - 21 Sep	easyJet
15 Sep - 21 Sep	easyJet
02 Sep - 10 Sep	easyJet
25 Sep - 01 Oct	Wizz Air Malta
03 Sep - 24 Sep	Aeroitalia
30 Sep - 05 Oct	easyJet
29 Sep - 26 Oct	Wizz Air Malta
22 Sep - 28 Sep	easyJet
01 Sep - 10 Sep	Aeroitalia
29 Sep - 04 Oct	Wizz Air Malta
27 Sep - 02 Oct	Wizz Air Malta
29 Sep - 05 Oct	Wizz Air Malta
08 Sep - 21 Sep	easyJet
23 Sep - 25 Sep	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 186€

Return flights