AirHint found the following cheapest return flights from Kathmandu (KTM) to Seoul (ICN) in August 2025 (see full year).

Return flights

25 Aug - 01 Sep	Thai AirAsia
20 Aug - 27 Aug	Cathay Pacific
22 Aug - 29 Aug	Cathay Pacific
27 Aug - 30 Aug	Cathay Pacific
19 Aug - 26 Aug	Cathay Pacific
29 Aug - 01 Sep	Cathay Pacific
18 Aug - 25 Aug	Cathay Pacific
01 Aug - 16 Aug	Thai Airways
18 Aug - 25 Aug	Korean Air	direct
25 Aug - 01 Sep	Korean Air	direct
22 Aug - 29 Aug	Korean Air	direct
29 Aug - 01 Sep	Korean Air	direct

Also check the deals for one-way flights from Kathmandu to Seoul in August.

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 Seoul in August from $458

Return flights