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

Return flights

10 Jan - 18 Jan	SriLankan Airlines
31 Jan - 07 Feb	SriLankan Airlines
05 Jan - 14 Jan	Air China
08 Jan - 17 Jan	Air China
12 Jan - 07 Feb	Air China
03 Jan - 11 Jan	SriLankan Airlines
05 Jan - 30 Jan	Thai Airways
10 Jan - 20 Jan	Thai Airways
09 Jan - 19 Jan	Thai Airways
29 Jan - 12 Feb	Thai Airways
10 Jan - 10 Feb	Thai Airways
02 Jan - 13 Jan	China Southern
03 Jan - 31 Jan	Thai Airways
20 Jan - 26 Jan	Thai Airways
28 Jan - 12 Feb	Thai Airways
31 Jan - 07 Feb	Korean Air	direct
10 Jan - 10 Feb	Korean Air	direct

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

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 January from 332€

Return flights