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

Return flights

25 Aug - 06 Sep	Vueling Airlines
31 Aug - 29 Sep	easyJet
26 Aug - 03 Sep	Norwegian
28 Aug - 06 Sep	easyJet
29 Aug - 10 Sep	Wizz Air Malta
26 Aug - 07 Sep	Norwegian
18 Aug - 03 Sep	Ryanair
18 Aug - 01 Sep	Ryanair
18 Aug - 31 Aug	Ryanair
21 Aug - 26 Aug	easyJet
22 Aug - 31 Aug	Wizz Air UK
20 Aug - 03 Sep	Vueling Airlines
18 Aug - 25 Aug	Ryanair
24 Aug - 31 Aug	Wizz Air
18 Aug - 24 Aug	Ryanair
22 Aug - 26 Aug	Wizz Air UK
31 Aug - 02 Sep	easyJet
23 Aug - 31 Aug	Wizz Air Malta
22 Aug - 27 Aug	Wizz Air UK
18 Aug - 26 Aug	Ryanair

Also check the deals for one-way flights from Barcelona to Keflavik in August.

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 August from 233€

Return flights