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

Return flights

28 Aug - 08 Sep	KLM
26 Aug - 02 Sep	easyJet
31 Aug - 11 Sep	easyJet
30 Aug - 06 Sep	SWISS
24 Aug - 31 Aug	LOT
26 Aug - 05 Sep	easyJet
31 Aug - 14 Sep	easyJet
26 Aug - 28 Aug	Lufthansa
26 Aug - 31 Aug	Lufthansa
25 Aug - 27 Aug	easyJet
24 Aug - 26 Aug	Lufthansa
22 Aug - 24 Aug	Iberia
22 Aug - 26 Aug	easyJet
22 Aug - 30 Aug	Scandinavian Airlines
21 Aug - 22 Aug	Austrian Airlines
24 Aug - 07 Sep	Vueling Airlines
21 Aug - 22 Aug	Icelandair	direct

Also check the deals for one-way flights from Geneva 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 Geneva to Keflavik in August from 269€

Return flights