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

Return flights

28 Aug - 11 Sep	easyJet
17 Aug - 21 Aug	Eurowings
30 Aug - 03 Sep	Lufthansa
28 Aug - 31 Aug	KLM
28 Aug - 06 Sep	Lufthansa
21 Aug - 28 Aug	Eurowings
30 Aug - 04 Sep	Lufthansa
21 Aug - 26 Aug	Eurowings
30 Aug - 06 Sep	Lufthansa
30 Aug - 04 Sep	Icelandair	direct
30 Aug - 02 Sep	Lufthansa
19 Aug - 27 Aug	Icelandair
17 Aug - 24 Aug	Eurowings
23 Aug - 26 Aug	SWISS
20 Aug - 27 Aug	Eurowings
19 Aug - 21 Aug	Icelandair
27 Aug - 05 Sep	SWISS
25 Aug - 29 Aug	SWISS
29 Aug - 07 Sep	Lufthansa
30 Aug - 02 Sep	Icelandair	direct

Also check the deals for one-way flights from Hamburg 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 Hamburg to Keflavik in August from 246€

Return flights