AirHint found the following cheapest return flights from Reus (REU) to Keflavik (KEF) in October 2025 (see full year).

Return flights

21 Oct - 27 Oct	easyJet
16 Oct - 23 Oct	Ryanair
20 Oct - 27 Oct	Ryanair
07 Oct - 13 Oct	easyJet
06 Oct - 09 Oct	Ryanair
02 Oct - 07 Oct	easyJet
09 Oct - 12 Oct	Ryanair
14 Oct - 21 Oct	easyJet
14 Oct - 18 Oct	easyJet
06 Oct - 12 Oct	Ryanair
20 Oct - 02 Nov	Ryanair

Also check the deals for one-way flights from Reus to Keflavik in October.

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 Reus to Keflavik in October from $240

Return flights