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

Return flights

01 Sep - 12 Sep	IndiGo
02 Sep - 08 Sep	IndiGo
01 Sep - 30 Sep	IndiGo
20 Sep - 27 Sep	Thai AirAsia
23 Sep - 29 Sep	Thai AirAsia
22 Sep - 30 Sep	Thai AirAsia
17 Sep - 21 Sep	Thai AirAsia
28 Sep - 12 Oct	HK Express
20 Sep - 28 Sep	Thai AirAsia
26 Sep - 12 Oct	HK Express
01 Sep - 01 Sep	Air India
19 Sep - 27 Sep	IndiGo
29 Sep - 24 Oct	HK Express
27 Sep - 12 Oct	HK Express
27 Sep - 04 Oct	HK Express
27 Sep - 11 Oct	HK Express
29 Sep - 01 Oct	HK Express
28 Sep - 13 Oct	HK Express
27 Sep - 13 Oct	HK Express
30 Sep - 25 Oct	HK Express

Also check the deals for one-way flights from Hong Kong 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 Hong Kong to Kathmandu in September from $329

Return flights