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

Return flights

16 Sep - 04 Oct	Wizz Air
14 Sep - 30 Sep	Wizz Air
04 Sep - 09 Sep	Wizz Air
13 Sep - 01 Oct	Wizz Air
03 Sep - 10 Sep	Wizz Air
04 Sep - 08 Sep	Wizz Air
04 Sep - 11 Sep	Wizz Air
03 Sep - 08 Sep	easyJet
16 Sep - 02 Oct	Wizz Air
16 Sep - 02 Oct	Icelandair	direct
16 Sep - 04 Oct	Icelandair	direct
04 Sep - 11 Sep	Icelandair	direct
05 Sep - 09 Sep	Fly Play

Also check the deals for one-way flights from Keflavik to Hamburg 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 Keflavik to Hamburg in September from 157€

Return flights