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

Return flights

12 May - 19 May	easyJet
09 May - 26 May	easyJet
06 May - 16 May	Vueling Airlines
02 May - 09 May	easyJet
18 May - 24 May	Wizz Air Malta
13 May - 20 May	easyJet
05 May - 10 May	Vueling Airlines
01 May - 08 May	Fly Play	direct
06 May - 11 May	Fly Play	direct
01 May - 11 May	Fly Play	direct
30 May - 07 Jun	Vueling Airlines
29 May - 12 Jun	Fly Play	direct
29 May - 07 Jun	Norwegian Air Sweden AOC
22 May - 07 Jun	Fly Play
22 May - 07 Jun	Icelandair	direct
29 May - 07 Jun	Icelandair	direct
30 May - 07 Jun	Icelandair	direct

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

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 May from $166

Return flights