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

Return flights

09 Sep - 01 Oct	Pegasus Airlines
01 Sep - 04 Oct	SunExpress
03 Sep - 27 Sep	Pegasus Airlines
05 Sep - 26 Sep	Pegasus Airlines
04 Sep - 18 Sep	Corendon Airlines
06 Sep - 19 Sep	Pegasus Airlines
22 Sep - 04 Oct	easyJet
07 Sep - 10 Oct	Pegasus Airlines
21 Sep - 03 Oct	Turkish Airlines
08 Sep - 26 Sep	Pegasus Airlines
20 Sep - 27 Sep	Turkish Airlines
08 Sep - 04 Oct	Pegasus Airlines
15 Sep - 20 Oct	easyJet
20 Sep - 04 Oct	Turkish Airlines
12 Sep - 03 Oct	easyJet
07 Sep - 05 Oct	Pegasus Airlines
08 Sep - 20 Sep	Pegasus Airlines
01 Sep - 30 Sep	IndiGo
15 Sep - 30 Sep	easyJet

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 $668

Return flights