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

Return flights

26 Mar - 09 Apr	easyJet
02 Mar - 09 Mar	easyJet
19 Mar - 22 Mar	Fly Play	direct
17 Mar - 21 Mar	Vueling Airlines
18 Mar - 21 Mar	Vueling Airlines
18 Mar - 22 Mar	Vueling Airlines
15 Mar - 22 Mar	Fly Play	direct
20 Mar - 28 Mar	Vueling Airlines
01 Mar - 01 Apr	Fly Play	direct
28 Mar - 06 Apr	Vueling Airlines
28 Mar - 03 Apr	Vueling Airlines
29 Mar - 06 Apr	Norwegian Air Sweden AOC
17 Mar - 21 Mar	Icelandair	direct
20 Mar - 28 Mar	Icelandair	direct
28 Mar - 06 Apr	Icelandair	direct

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

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 March from $168

Return flights