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

Return flights

28 Sep - 08 Oct	Ryanair
22 Sep - 08 Oct	Ryanair
24 Sep - 10 Oct	Ryanair
29 Sep - 08 Oct	Ryanair
24 Sep - 30 Sep	Ryanair
19 Sep - 08 Oct	Ryanair
22 Sep - 24 Sep	Ryanair
19 Sep - 24 Sep	Ryanair
28 Sep - 03 Oct	Ryanair
30 Sep - 08 Oct	Vueling Airlines
22 Sep - 30 Sep	Ryanair
22 Sep - 09 Oct	Ryanair
30 Sep - 31 Oct	Vueling Airlines
19 Sep - 23 Sep	Ryanair
19 Sep - 26 Sep	Ryanair
26 Sep - 30 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
26 Sep - 03 Oct	Ryanair
28 Sep - 30 Sep	Ryanair
19 Sep - 22 Sep	Ryanair

Also check the deals for one-way flights from Duesseldorf 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 Duesseldorf to Lisbon in September from $132

Return flights