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

Return flights

31 Aug - 08 Sep	Lufthansa
25 Aug - 06 Sep	SWISS
23 Aug - 06 Sep	SWISS
28 Aug - 06 Sep	SWISS
27 Aug - 06 Sep	SWISS
28 Aug - 05 Sep	Scandinavian Airlines
28 Aug - 01 Sep	Scandinavian Airlines
13 Aug - 20 Aug	SWISS
29 Aug - 06 Sep	SWISS
29 Aug - 05 Sep	Scandinavian Airlines
25 Aug - 02 Sep	SWISS
22 Aug - 29 Aug	Scandinavian Airlines
14 Aug - 20 Aug	SWISS
07 Aug - 12 Aug	SWISS
20 Aug - 27 Aug	SWISS
21 Aug - 26 Aug	SWISS
06 Aug - 10 Aug	SWISS
14 Aug - 22 Aug	SWISS
13 Aug - 22 Aug	SWISS
20 Aug - 24 Aug	SWISS

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 $231

Return flights