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

One-Way flights

03 Sep	Thai AirAsia X
07 Sep	Thai AirAsia X
09 Sep	Air China
11 Sep	Air China
10 Sep	Air China
05 Sep	Air China
15 Sep	Air China
14 Sep	SriLankan Airlines
02 Sep	SriLankan Airlines
17 Sep	Thai Airways

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 $226

One-Way flights