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

Return flights

31 Aug - 09 Sep	Lufthansa
25 Aug - 01 Sep	Vueling Airlines
24 Aug - 02 Sep	Vueling Airlines
27 Aug - 03 Sep	Vueling Airlines
26 Aug - 04 Sep	Wizz Air
28 Aug - 31 Aug	Vueling Airlines
26 Aug - 29 Aug	Lufthansa
25 Aug - 30 Aug	Vueling Airlines
23 Aug - 30 Aug	Air France
18 Aug - 30 Aug	Lufthansa
13 Aug - 21 Aug	Lufthansa
17 Aug - 24 Aug	Norwegian
10 Aug - 17 Aug	easyJet
15 Aug - 22 Aug	LOT
01 Aug - 03 Aug	Austrian Airlines

Also check the deals for one-way flights from Lyon 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 Lyon to Keflavik in August from $293

Return flights