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

Return flights

15 Sep - 03 Oct	Ryanair
15 Sep - 22 Sep	Ryanair
20 Sep - 27 Sep	Pegasus Airlines
15 Sep - 15 Oct	Ryanair
19 Sep - 03 Oct	Pegasus Airlines
25 Sep - 30 Sep	Pegasus Airlines
22 Sep - 30 Sep	Ryanair
15 Sep - 04 Oct	Ryanair
18 Sep - 25 Sep	Pegasus Airlines
23 Sep - 08 Oct	Pegasus Airlines
16 Sep - 13 Oct	SunExpress
21 Sep - 08 Oct	Pegasus Airlines
28 Sep - 12 Oct	Pegasus Airlines
16 Sep - 16 Oct	SunExpress
18 Sep - 09 Oct	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 582€

Return flights