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

Return flights

23 Sep - 29 Sep	Wizz Air
23 Sep - 30 Sep	Wizz Air
23 Sep - 25 Sep	Wizz Air
27 Sep - 29 Sep	Wizz Air
30 Sep - 08 Oct	Wizz Air
23 Sep - 24 Sep	Wizz Air
25 Sep - 30 Sep	Wizz Air
27 Sep - 30 Sep	Wizz Air
28 Sep - 01 Oct	Wizz Air
30 Sep - 06 Oct	Wizz Air
23 Sep - 28 Sep	Wizz Air
24 Sep - 29 Sep	Wizz Air
30 Sep - 09 Oct	Wizz Air
26 Sep - 03 Oct	Ryanair
25 Sep - 29 Sep	Wizz Air
29 Sep - 06 Oct	Norwegian
27 Sep - 01 Oct	Wizz Air
24 Sep - 03 Oct	Wizz Air
28 Sep - 05 Oct	Wizz Air
28 Sep - 03 Oct	Wizz Air

Also check the deals for one-way flights from Hamburg to Oslo 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 Oslo in September from 79€

Return flights