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

Return flights

09 Dec - 16 Dec	Air China
07 Dec - 21 Jan	China Southern
04 Dec - 11 Dec	Air China
23 Dec - 23 Jan	Air China
08 Dec - 22 Jan	Air China
08 Dec - 09 Jan	China Southern
28 Dec - 03 Jan	China Southern
02 Dec - 05 Dec	Thai Airways
08 Dec - 15 Dec	Air China
12 Dec - 19 Dec	Thai Airways
21 Dec - 21 Jan	Thai Airways
22 Dec - 22 Jan	Thai Airways
18 Dec - 05 Jan	China Southern
02 Dec - 22 Dec	Korean Air
17 Dec - 22 Dec	Cathay Pacific
04 Dec - 24 Dec	Air China
03 Dec - 10 Dec	China Southern
14 Dec - 05 Jan	China Southern
15 Dec - 05 Jan	China Southern
01 Dec - 20 Dec	Thai Airways

Also check the deals for one-way flights from Kathmandu to Tokyo in December.

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 December from $570

Return flights