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

Return flights

03 Sep - 10 Sep	Wizz Air
02 Sep - 10 Sep	easyJet
03 Sep - 09 Sep	Wizz Air
20 Sep - 30 Sep	Wizz Air
03 Sep - 07 Sep	Wizz Air
20 Sep - 25 Sep	Wizz Air
04 Sep - 09 Sep	Scandinavian Airlines
02 Sep - 07 Sep	Wizz Air
25 Sep - 04 Oct	Scandinavian Airlines
21 Sep - 01 Oct	LOT
12 Sep - 20 Sep	Ryanair
27 Sep - 07 Oct	Ryanair
13 Sep - 20 Sep	Ryanair
13 Sep - 09 Oct	Wizz Air
30 Sep - 07 Oct	easyJet
28 Sep - 06 Oct	Scandinavian Airlines
13 Sep - 09 Oct	Icelandair	direct
27 Sep - 07 Oct	Icelandair	direct
25 Sep - 04 Oct	Icelandair	direct
26 Sep - 03 Oct	Scandinavian Airlines

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 183€

Return flights