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

Return flights

22 Sep - 24 Sep	Ryanair
22 Sep - 30 Sep	Ryanair
22 Sep - 26 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
25 Sep - 01 Oct	easyJet
23 Sep - 25 Sep	easyJet
25 Sep - 30 Sep	easyJet
26 Sep - 30 Sep	easyJet
09 Sep - 16 Sep	Ryanair
17 Sep - 22 Sep	Ryanair
25 Sep - 29 Sep	easyJet
21 Sep - 05 Oct	Ryanair
30 Sep - 04 Oct	Ryanair
26 Sep - 02 Oct	HiSky Europe
20 Sep - 04 Oct	LOT
18 Sep - 02 Oct	Ryanair
26 Sep - 02 Oct	Eurowings	direct
18 Sep - 02 Oct	Eurowings	direct
21 Sep - 05 Oct	Eurowings	direct

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 $144

Return flights