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

Return flights

20 Sep - 04 Oct	Pegasus Airlines
21 Sep - 28 Sep	Ryanair
28 Sep - 01 Oct	SunExpress
22 Sep - 08 Oct	Ryanair
18 Sep - 18 Oct	Pegasus Airlines
22 Sep - 29 Sep	Ryanair
28 Sep - 30 Sep	SunExpress
22 Sep - 05 Oct	Ryanair
20 Sep - 10 Oct	Pegasus Airlines
20 Sep - 27 Sep	Pegasus Airlines
20 Sep - 17 Oct	Pegasus Airlines
19 Sep - 10 Oct	Pegasus Airlines
19 Sep - 26 Sep	Ryanair
28 Sep - 10 Oct	SunExpress
23 Sep - 11 Oct	Ryanair
27 Sep - 29 Sep	Pegasus Airlines

Also check the deals for one-way flights from Birmingham 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 Birmingham to Kathmandu in September from $755

Return flights