AirHint found the following cheapest return flights from Dortmund (DTM) to Lisbon (LIS) in September 2025 (see full year).

Return flights

27 Sep - 01 Oct	Wizz Air
03 Sep - 10 Sep	Wizz Air
17 Sep - 18 Sep	Wizz Air
09 Sep - 17 Sep	Wizz Air
16 Sep - 19 Sep	Wizz Air
04 Sep - 11 Sep	Wizz Air
17 Sep - 19 Sep	Wizz Air
03 Sep - 11 Sep	Wizz Air
20 Sep - 26 Sep	Wizz Air
11 Sep - 14 Sep	Wizz Air
25 Sep - 05 Oct	Wizz Air
13 Sep - 20 Sep	Wizz Air
27 Sep - 05 Oct	Wizz Air
26 Sep - 05 Oct	Wizz Air

Also check the deals for one-way flights from Dortmund to Lisbon 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 Dortmund to Lisbon in September from 199€

Return flights