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

Return flights

06 Sep - 19 Sep	T'way Air
05 Sep - 08 Sep	Air China
06 Sep - 16 Sep	Air China
04 Sep - 17 Sep	Air China
05 Sep - 18 Sep	Air China
13 Sep - 19 Sep	Air China
10 Sep - 17 Sep	Air China
02 Sep - 11 Sep	Air China
04 Sep - 08 Sep	Air China
02 Sep - 16 Sep	Air China
13 Sep - 14 Oct	Air China
03 Sep - 19 Oct	Air China
23 Sep - 05 Oct	China Eastern
24 Sep - 07 Oct	China Eastern
12 Sep - 07 Oct	Air China
25 Sep - 08 Oct	Scoot
06 Sep - 21 Oct	Cathay Pacific
27 Sep - 19 Oct	Scoot
25 Sep - 31 Oct	T'way Air
19 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 $498

Return flights