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

Return flights

17 Sep - 15 Oct	China Eastern
19 Sep - 24 Oct	China Eastern
01 Sep - 01 Sep	Korean Air
11 Sep - 14 Sep	Korean Air
05 Sep - 10 Sep	Korean Air
13 Sep - 17 Sep	Korean Air
28 Sep - 06 Oct	Korean Air
29 Sep - 06 Oct	Korean Air
28 Sep - 05 Oct	Singapore Airlines
28 Sep - 07 Oct	Korean Air

Also check the deals for one-way flights from Busan 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 Busan to Kathmandu in September from 396€

Return flights