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

Return flights

30 Sep - 25 Oct	ANA
01 Sep - 26 Sep	Malaysia Airlines
05 Sep - 09 Sep	Japan Airlines
04 Sep - 10 Sep	Malaysia Airlines
03 Sep - 10 Sep	Malaysia Airlines
04 Sep - 08 Sep	Japan Airlines
19 Sep - 23 Sep	Japan Airlines
13 Sep - 16 Sep	Malaysia Airlines
10 Sep - 15 Sep	Malaysia Airlines
10 Sep - 20 Oct	Malaysia Airlines
27 Sep - 16 Oct	Malaysia Airlines
21 Sep - 10 Oct	Malaysia Airlines
02 Sep - 07 Sep	Japan Airlines
11 Sep - 07 Oct	Japan Airlines
22 Sep - 11 Oct	Japan Airlines
28 Sep - 01 Oct	Japan Airlines
27 Sep - 01 Oct	Japan Airlines
10 Sep - 14 Sep	Japan Airlines
19 Sep - 24 Oct	Japan Airlines
27 Sep - 25 Oct	Malaysia Airlines

Also check the deals for one-way flights from Osaka 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 Osaka to Kathmandu in September from 664€

Return flights