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

Return flights

27 Aug - 08 Sep	Jet2
26 Aug - 04 Sep	easyJet
21 Aug - 28 Aug	Ryanair
28 Aug - 01 Sep	Ryanair
18 Aug - 28 Aug	Ryanair
07 Aug - 28 Aug	Ryanair
20 Aug - 28 Aug	Jet2
21 Aug - 25 Aug	Ryanair
19 Aug - 28 Aug	Ryanair
07 Aug - 14 Aug	Ryanair
05 Aug - 14 Aug	Ryanair
14 Aug - 21 Aug	Ryanair
14 Aug - 25 Aug	Ryanair
20 Aug - 01 Sep	Jet2
27 Aug - 06 Sep	Jet2

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

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 August from 438€

Return flights