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

Return flights

16 Sep - 25 Sep	Wizz Air Malta
12 Sep - 25 Sep	Vueling Airlines
15 Sep - 21 Sep	Vueling Airlines
13 Sep - 18 Sep	Wizz Air
12 Sep - 21 Sep	Vueling Airlines
22 Sep - 28 Sep	Vueling Airlines
06 Sep - 14 Sep	Wizz Air
16 Sep - 23 Sep	Wizz Air Malta
22 Sep - 25 Sep	Wizz Air UK
16 Sep - 27 Sep	Wizz Air Malta
30 Sep - 09 Oct	Wizz Air UK
13 Sep - 04 Oct	Wizz Air
30 Sep - 04 Oct	Wizz Air UK
23 Sep - 01 Oct	Wizz Air Malta
30 Sep - 07 Oct	Wizz Air UK
23 Sep - 02 Oct	Wizz Air Malta
25 Sep - 03 Oct	Wizz Air
26 Sep - 04 Oct	Wizz Air UK
02 Sep - 07 Oct	Ryanair
18 Sep - 01 Oct	Wizz Air Malta

Also check the deals for one-way flights from Barcelona 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 Barcelona to Keflavik in September from 178€

Return flights