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

Return flights

30 Jul - 09 Aug	China Eastern
29 Jul - 18 Aug	Sichuan Airlines
31 Jul - 31 Aug	Sichuan Airlines
30 Jul - 06 Aug	China Eastern
28 Jul - 04 Aug	China Eastern
31 Jul - 04 Aug	Air India
29 Jul - 08 Aug	Air India
28 Jul - 09 Aug	Air China
28 Jul - 10 Aug	Air China
28 Jul - 29 Aug	Air China
29 Jul - 31 Jul	Thai Airways
28 Jul - 31 Jul	Thai Airways
27 Jul - 30 Jul	Thai Airways

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

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 July from 274€

Return flights