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

Return flights

22 Sep - 29 Sep	Air India
20 Sep - 31 Oct	China Southern
23 Sep - 27 Oct	China Southern
25 Sep - 04 Oct	Air India
29 Sep - 08 Oct	Air India
25 Sep - 08 Oct	Air India
24 Sep - 08 Oct	Thai AirAsia
25 Sep - 07 Oct	Thai AirAsia
28 Sep - 08 Oct	Air India
24 Sep - 03 Oct	Thai AirAsia
26 Sep - 08 Oct	Thai AirAsia
21 Sep - 23 Sep	China Southern
21 Sep - 24 Sep	China Southern
21 Sep - 25 Sep	China Southern
29 Sep - 29 Sep	Thai Airways
21 Sep - 28 Sep	Thai Airways
27 Sep - 29 Sep	Thai Airways
28 Sep - 29 Sep	Thai Airways
23 Sep - 30 Sep	Thai Airways
27 Sep - 28 Sep	Thai Airways

Also check the deals for one-way flights from Kathmandu to Tokyo 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 Kathmandu to Tokyo in September from 506€

Return flights