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

Return flights

28 Aug - 30 Sep	SWISS
28 Aug - 08 Sep	SWISS
29 Aug - 08 Sep	Scandinavian Airlines
31 Aug - 08 Sep	Lufthansa
28 Aug - 06 Sep	SWISS
27 Aug - 06 Sep	SWISS
25 Aug - 24 Sep	SWISS
28 Aug - 05 Sep	Scandinavian Airlines
22 Aug - 27 Aug	Scandinavian Airlines
27 Aug - 01 Sep	SWISS
25 Aug - 01 Sep	SWISS
14 Aug - 20 Aug	SWISS
21 Aug - 27 Aug	SWISS
13 Aug - 20 Aug	SWISS
20 Aug - 29 Aug	SWISS
23 Aug - 29 Aug	SWISS
21 Aug - 29 Aug	SWISS
16 Aug - 20 Aug	Lufthansa
06 Aug - 12 Aug	SWISS
28 Aug - 31 Aug	Fly Play	direct

Also check the deals for one-way flights from Prague 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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Cheapest return flights from Prague to Keflavik in August from $201

Return flights