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

Return flights

08 Sep - 08 Oct	AJet
07 Sep - 04 Oct	Pegasus Airlines
14 Sep - 29 Sep	Pegasus Airlines
07 Sep - 21 Sep	AJet
09 Sep - 23 Sep	IndiGo
13 Sep - 26 Sep	AJet
04 Sep - 17 Sep	IndiGo
06 Sep - 14 Sep	Pegasus Airlines
01 Sep - 15 Sep	IndiGo
22 Sep - 26 Sep	Wizz Air
16 Sep - 23 Sep	AJet
04 Sep - 07 Oct	AJet
03 Sep - 13 Sep	Pegasus Airlines
04 Sep - 21 Oct	AJet
29 Sep - 14 Oct	Wizz Air
30 Sep - 17 Oct	Ryanair
30 Sep - 19 Oct	Ryanair
13 Sep - 06 Oct	IndiGo
30 Sep - 18 Oct	Ryanair
16 Sep - 07 Oct	AJet

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 $662

Return flights