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

Return flights

17 Sep - 03 Oct	Air China
15 Sep - 26 Sep	Air China
19 Sep - 26 Sep	Air China
22 Sep - 15 Oct	Air China
15 Sep - 28 Sep	Air China
15 Sep - 23 Sep	China Eastern
18 Sep - 25 Sep	China Eastern
18 Sep - 22 Oct	Zipair
23 Sep - 21 Oct	Thai AirAsia X
16 Sep - 05 Oct	Air China
22 Sep - 12 Oct	Scoot
17 Sep - 30 Sep	China Eastern
28 Sep - 12 Oct	VietJet Air
23 Sep - 26 Sep	Thai AirAsia X
17 Sep - 24 Oct	Air China
22 Sep - 07 Oct	Air China
15 Sep - 21 Sep	Thai AirAsia X
15 Sep - 22 Sep	VietJet Air
20 Sep - 23 Sep	Thai AirAsia X
30 Sep - 28 Oct	VietJet Air

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 432€

Return flights