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

Return flights

29 Sep - 01 Oct	easyJet
30 Sep - 01 Oct	easyJet
28 Sep - 29 Sep	Eurowings
23 Sep - 30 Sep	Ryanair
22 Sep - 25 Sep	Ryanair
28 Sep - 06 Oct	Eurowings
30 Sep - 06 Oct	Ryanair
30 Sep - 02 Oct	easyJet
29 Sep - 05 Oct	Ryanair
25 Sep - 16 Oct	easyJet
23 Sep - 24 Sep	Ryanair
24 Sep - 26 Sep	easyJet
25 Sep - 26 Sep	easyJet
21 Sep - 25 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
22 Sep - 23 Sep	Ryanair
28 Sep - 03 Oct	Eurowings
28 Sep - 06 Oct	Eurowings	direct
23 Sep - 25 Sep	Eurowings	direct
30 Sep - 05 Oct	Ryanair

Also check the deals for one-way flights from Duesseldorf to Bucharest 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 Bucharest in September from 110€

Return flights