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

Return flights

27 Aug - 05 Sep	Air France
31 Aug - 06 Sep	Scandinavian Airlines
31 Aug - 07 Sep	Scandinavian Airlines
19 Aug - 26 Aug	Icelandair	direct
28 Aug - 06 Sep	easyJet
17 Aug - 31 Aug	SWISS
24 Aug - 31 Aug	SWISS
21 Aug - 31 Aug	SWISS
22 Aug - 31 Aug	SWISS
30 Aug - 07 Sep	Lufthansa	direct
31 Aug - 07 Sep	Lufthansa	direct
20 Aug - 31 Aug	Icelandair	direct
13 Aug - 24 Aug	Icelandair	direct
27 Aug - 05 Sep	Icelandair	direct
18 Aug - 25 Aug	Icelandair	direct
24 Aug - 31 Aug	Lufthansa	direct
21 Aug - 08 Sep	SWISS
22 Aug - 31 Aug	Lufthansa	direct
24 Aug - 07 Sep	SWISS
24 Aug - 07 Sep	Icelandair	direct

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Keflavik in August from $361

Return flights