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

Return flights

01 Sep - 08 Sep	Cathay Pacific
19 Sep - 26 Sep	Shenzhen Airlines
19 Sep - 03 Oct	Hainan Airlines
09 Sep - 16 Sep	Cathay Pacific
09 Sep - 15 Oct	Thai Airways
12 Sep - 22 Sep	Thai Airways
27 Sep - 05 Oct	Shenzhen Airlines
25 Sep - 04 Oct	Air China
29 Sep - 09 Oct	Air China
19 Sep - 04 Oct	Air China
29 Sep - 07 Oct	Air China
27 Sep - 07 Oct	Air China
28 Sep - 07 Oct	Air China
26 Sep - 05 Oct	Air China

Also check the deals for one-way flights from Beijing 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 Beijing to Kathmandu in September from $340

Return flights