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

Return flights

17 Sep - 24 Sep	Wizz Air
23 Sep - 30 Sep	Wizz Air
17 Sep - 28 Sep	Wizz Air
24 Sep - 28 Sep	Wizz Air
27 Sep - 28 Sep	Wizz Air
16 Sep - 24 Sep	Wizz Air
27 Sep - 30 Sep	Wizz Air
16 Sep - 23 Sep	Wizz Air
16 Sep - 25 Sep	Wizz Air
20 Sep - 28 Sep	Wizz Air
27 Sep - 05 Oct	Wizz Air
30 Sep - 11 Oct	Wizz Air
27 Sep - 04 Oct	Wizz Air
30 Sep - 04 Oct	Wizz Air
26 Sep - 04 Oct	Ryanair
27 Sep - 04 Oct	Icelandair	direct
20 Sep - 04 Oct	Wizz Air
30 Sep - 11 Oct	Icelandair	direct
30 Sep - 04 Oct	Icelandair	direct

Also check the deals for one-way flights from Hamburg to Keflavik in September.

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 September from 149€

Return flights