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

Return flights

14 Sep - 24 Sep	Ryanair
22 Sep - 24 Sep	Vueling Airlines
10 Sep - 24 Sep	Ryanair
28 Sep - 01 Oct	TAP
17 Sep - 24 Sep	Ryanair
16 Sep - 24 Sep	Vueling Airlines
28 Sep - 30 Sep	TAP
07 Sep - 16 Sep	Ryanair
16 Sep - 17 Sep	Vueling Airlines
22 Sep - 23 Sep	Vueling Airlines
29 Sep - 13 Oct	Vueling Airlines
15 Sep - 24 Sep	TAP	direct
21 Sep - 02 Oct	easyJet
28 Sep - 02 Oct	easyJet
29 Sep - 14 Oct	Vueling Airlines
29 Sep - 03 Oct	easyJet
27 Sep - 01 Oct	easyJet
30 Sep - 13 Oct	Vueling Airlines
27 Sep - 16 Oct	easyJet
29 Sep - 15 Oct	Vueling Airlines

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 $145

Return flights