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

Return flights

04 Sep - 21 Sep	IndiGo
09 Sep - 07 Oct	Ryanair
03 Sep - 13 Sep	IndiGo
26 Sep - 08 Oct	Pegasus Airlines
01 Sep - 10 Sep	IndiGo
01 Sep - 11 Sep	IndiGo
02 Sep - 11 Sep	IndiGo
25 Sep - 05 Oct	Pegasus Airlines
18 Sep - 28 Sep	IndiGo
02 Sep - 10 Sep	Ryanair
08 Sep - 06 Oct	Etihad Airways
24 Sep - 05 Oct	IndiGo
13 Sep - 12 Oct	Pegasus Airlines
26 Sep - 17 Oct	Pegasus Airlines
27 Sep - 12 Oct	AJet
10 Sep - 10 Oct	Etihad Airways
30 Sep - 15 Oct	Etihad Airways
02 Sep - 23 Sep	Emirates

Also check the deals for one-way flights from Brussels 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 Brussels to Kathmandu in September from 554€

Return flights