AirHint found the following cheapest one-way flights from Tokyo (TYO) to Kathmandu (KTM) in September 2025 (see full year).

One-Way flights

10 Sep	Thai AirAsia X
09 Sep	VietJet Air
28 Sep	Thai AirAsia X
29 Sep	Thai AirAsia X
12 Sep	Air China
08 Sep	Air China
04 Sep	Air China
14 Sep	SriLankan Airlines
30 Sep	SriLankan Airlines
20 Sep	SriLankan Airlines

Also check the deals for return 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 one-way flights from Tokyo to Kathmandu in September from $229

One-Way flights