AirHint found the following cheapest return flights from Rome (FCO) to Keflavik (KEF) in September 2026 (see full year).

Return flights

26 Sep - 03 Oct	Vueling Airlines
26 Sep - 10 Oct	Vueling Airlines
05 Sep - 12 Sep	Scandinavian Airlines
19 Sep - 03 Oct	Vueling Airlines
07 Sep - 12 Sep	Transavia France
20 Sep - 27 Sep	KLM
07 Sep - 13 Sep	Transavia France
23 Sep - 28 Sep	KLM
27 Sep - 01 Oct	KLM
19 Sep - 26 Sep	Transavia France
27 Sep - 04 Oct	KLM
01 Sep - 09 Sep	Scandinavian Airlines
03 Sep - 13 Sep	Norwegian
19 Sep - 23 Sep	Vueling Airlines
05 Sep - 13 Sep	Transavia France
27 Sep - 01 Oct	Icelandair	direct
27 Sep - 04 Oct	Icelandair	direct

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 222€

Return flights