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

Return flights

10 Sep - 17 Sep	Qatar Airways
13 Sep - 27 Sep	Qatar Airways
03 Sep - 23 Oct	Qatar Airways
16 Sep - 11 Oct	Qatar Airways
15 Sep - 11 Oct	Qatar Airways
22 Sep - 29 Oct	Etihad Airways
29 Sep - 29 Oct	Etihad Airways
25 Sep - 27 Oct	Turkish Airlines
28 Sep - 27 Oct	Turkish Airlines
27 Sep - 25 Oct	Etihad Airways
26 Sep - 27 Oct	Turkish Airlines
27 Sep - 24 Oct	Qatar Airways

Also check the deals for one-way flights from Duesseldorf to Kathmandu 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 Kathmandu in September from 970€

Return flights