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

Return flights

01 Aug - 07 Aug	Lufthansa
21 Aug - 29 Aug	Fly Play
05 Aug - 13 Aug	Lufthansa
06 Aug - 14 Aug	Wizz Air
05 Aug - 09 Aug	Wizz Air Malta
01 Aug - 06 Aug	Lufthansa
01 Aug - 04 Aug	Wizz Air Malta
17 Aug - 31 Aug	Vueling Airlines
24 Aug - 31 Aug	Vueling Airlines
31 Aug - 14 Sep	Vueling Airlines
24 Aug - 14 Sep	Vueling Airlines
17 Aug - 07 Sep	Vueling Airlines
24 Aug - 07 Sep	Vueling Airlines
10 Aug - 31 Aug	Vueling Airlines

Also check the deals for one-way flights from Keflavik to Prague 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 Prague in August from 207€

Return flights