AirHint found the following cheapest return flights from Barcelona (BCN) to Keflavik (KEF) in August 2025 (see full year).

Return flights

25 Aug - 05 Sep	Fly Play	direct
31 Aug - 10 Sep	Vueling Airlines
31 Aug - 08 Sep	Vueling Airlines
27 Aug - 10 Sep	Wizz Air Malta
27 Aug - 04 Sep	Vueling Airlines
25 Aug - 07 Sep	Fly Play
15 Aug - 20 Aug	Ryanair
26 Aug - 06 Sep	Ryanair
28 Aug - 05 Sep	Vueling Airlines
20 Aug - 27 Aug	Vueling Airlines
15 Aug - 27 Aug	Ryanair
28 Aug - 07 Sep	Ryanair
19 Aug - 27 Aug	Vueling Airlines
31 Aug - 10 Sep	Fly Play	direct
21 Aug - 27 Aug	Vueling Airlines
18 Aug - 27 Aug	Vueling Airlines
15 Aug - 21 Aug	Ryanair
15 Aug - 30 Aug	Ryanair
25 Aug - 30 Aug	Wizz Air Malta
16 Aug - 27 Aug	Vueling Airlines

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 $206

Return flights