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

Return flights

03 Sep - 06 Sep	Fly Play
03 Sep - 07 Sep	Fly Play
07 Sep - 17 Sep	Wizz Air Malta
02 Sep - 06 Sep	Fly Play
22 Sep - 01 Oct	transavia
02 Sep - 05 Sep	Fly Play
26 Sep - 04 Oct	Fly Play
07 Sep - 14 Sep	Vueling Airlines	direct
27 Sep - 01 Oct	Fly Play
29 Sep - 06 Oct	Fly Play
22 Sep - 01 Oct	Fly Play	direct
26 Sep - 04 Oct	Icelandair	direct
29 Sep - 06 Oct	Fly Play	direct
27 Sep - 01 Oct	Icelandair	direct

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

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 Reykjavik to Barcelona in September from $206

Return flights