AirHint found the following cheapest return flights from Prague (PRG) to Keflavik (KEF) in August 2026 (see full year).

Return flights

31 Aug - 09 Sep	easyJet
19 Aug - 25 Aug	SWISS
26 Aug - 02 Sep	SWISS
25 Aug - 01 Sep	Ryanair
27 Aug - 07 Sep	Ryanair
19 Aug - 24 Aug	SWISS
19 Aug - 27 Aug	SWISS
20 Aug - 29 Aug	Ryanair
24 Aug - 07 Sep	SWISS
19 Aug - 28 Aug	SWISS
17 Aug - 26 Aug	SWISS
17 Aug - 24 Aug	SWISS
17 Aug - 27 Aug	SWISS
04 Aug - 11 Aug	Finnair
14 Aug - 21 Aug	Scandinavian Airlines
21 Aug - 05 Sep	Finnair
26 Aug - 02 Sep	Icelandair	direct
24 Aug - 07 Sep	Icelandair	direct
31 Aug - 09 Sep	Icelandair	direct
21 Aug - 04 Sep	Icelandair	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.

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Cheapest return flights from Prague to Keflavik in August from $309

Return flights