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

Return flights

02 Sep - 09 Sep	Air China
06 Sep - 21 Sep	Air China
06 Sep - 12 Sep	Air China
06 Sep - 10 Sep	Air China
08 Sep - 12 Sep	Air China
06 Sep - 15 Sep	Air China
06 Sep - 16 Sep	Air China
05 Sep - 14 Sep	Air China
06 Sep - 14 Sep	Air China
08 Sep - 11 Sep	Air China
05 Sep - 15 Oct	Air China
06 Sep - 12 Oct	Air China
15 Sep - 15 Oct	Air China
11 Sep - 27 Oct	Thai AirAsia X
18 Sep - 18 Oct	Peach
29 Sep - 17 Oct	Peach
27 Sep - 27 Oct	Thai AirAsia X
21 Sep - 28 Oct	Peach
30 Sep - 20 Oct	Air China
30 Sep - 15 Oct	Air China

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 440€

Return flights