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

Return flights

15 Sep - 25 Sep	Air China
15 Sep - 21 Sep	VietJet Air
15 Sep - 22 Sep	VietJet Air
15 Sep - 20 Sep	Air India
25 Sep - 24 Oct	Tigerair Taiwan
17 Sep - 27 Sep	VietJet Air
17 Sep - 24 Sep	VietJet Air
15 Sep - 14 Oct	Thai Airways
29 Sep - 03 Oct	VietJet Air
17 Sep - 11 Oct	Thai Airways
17 Sep - 25 Oct	Air India
30 Sep - 30 Oct	Air India
27 Sep - 25 Oct	Air India
16 Sep - 18 Sep	Thai Airways
20 Sep - 02 Oct	Thai Airways
27 Sep - 01 Oct	Thai Airways
20 Sep - 08 Oct	Thai Airways
24 Sep - 30 Sep	Thai Airways
18 Sep - 25 Sep	Thai Airways
22 Sep - 26 Sep	Asiana Airlines

Also check the deals for one-way flights from Tokyo 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 Tokyo to Kathmandu in September from 488€

Return flights