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

Return flights

03 Sep - 23 Sep	Air China
08 Sep - 23 Sep	Air China
10 Sep - 24 Sep	Air China
10 Sep - 23 Sep	Air China
04 Sep - 11 Sep	Air China
05 Sep - 12 Sep	Peach
15 Sep - 24 Sep	Jetstar Japan
07 Sep - 12 Sep	Air China
03 Sep - 21 Sep	Air China
08 Sep - 21 Sep	Air China
11 Sep - 05 Oct	China Eastern
13 Sep - 03 Oct	Air China
09 Sep - 24 Oct	China Eastern
10 Sep - 03 Oct	Air China
04 Sep - 03 Oct	Air China
17 Sep - 08 Oct	Thai AirAsia X
16 Sep - 24 Oct	Jetstar Japan
18 Sep - 27 Oct	China Eastern
07 Sep - 24 Oct	China Eastern
19 Sep - 27 Oct	China Eastern

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 391€

Return flights