AirHint found the following cheapest return flights from Seoul (ICN) to Kathmandu (KTM) in August 2026 (see full year).

Return flights

20 Aug - 26 Aug	Thai AirAsia X
26 Aug - 30 Aug	SriLankan Airlines
05 Aug - 09 Aug	SriLankan Airlines
08 Aug - 11 Aug	Malaysia Airlines
03 Aug - 11 Aug	Malaysia Airlines
04 Aug - 11 Aug	Malaysia Airlines
08 Aug - 18 Aug	Malaysia Airlines
14 Aug - 22 Aug	Thai Airways
25 Aug - 30 Aug	China Southern
25 Aug - 29 Aug	Thai Airways

Also check the deals for one-way flights from Seoul to Kathmandu 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 Seoul to Kathmandu in August from $464

Return flights