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

Return flights

21 Aug - 28 Aug	Wizz Air
19 Aug - 26 Aug	Wizz Air
19 Aug - 27 Aug	Wizz Air
26 Aug - 02 Sep	Wizz Air
12 Aug - 16 Aug	Wizz Air
14 Aug - 18 Aug	Scandinavian Airlines
12 Aug - 19 Aug	Wizz Air
23 Aug - 20 Sep	Scandinavian Airlines
09 Aug - 16 Aug	Wizz Air
05 Aug - 10 Aug	Wizz Air Malta
24 Aug - 07 Sep	Vueling Airlines
17 Aug - 31 Aug	Vueling Airlines
17 Aug - 07 Sep	Vueling Airlines

Also check the deals for one-way flights from Keflavik to Athens 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 Keflavik to Athens in August from 294€

Return flights