Cheapest return flights from Keflavik to Barcelona in September from $224

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

Return flights

06 Sep - 14 Sep Scandinavian Airlines
10 Sep - 16 Sep easyJet
24 Sep - 29 Sep easyJet
08 Sep - 14 Sep Transavia France
24 Sep - 28 Sep easyJet
20 Sep - 29 Sep Wizz Air
01 Sep - 07 Sep Fly Play
11 Sep - 17 Sep Fly Play
03 Sep - 09 Sep easyJet
13 Sep - 19 Sep Fly Play
29 Sep - 06 Oct Fly Play
22 Sep - 01 Oct Fly Play
22 Sep - 01 Oct Fly Play direct
29 Sep - 06 Oct Fly Play direct

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

Skyscanner

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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