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

Return flights

14 Jan - 21 Jan	Air China
14 Jan - 28 Jan	Air China
01 Jan - 08 Jan	Air China
05 Jan - 17 Jan	Air China
11 Jan - 24 Jan	Air China
12 Jan - 24 Jan	Air China
12 Jan - 21 Jan	Air China
12 Jan - 20 Jan	Air China
01 Jan - 13 Jan	Air China
11 Jan - 31 Jan	Air China
21 Jan - 17 Feb	Air China
21 Jan - 18 Feb	Air China
19 Jan - 17 Feb	Air China
23 Jan - 20 Feb	Thai Airways
19 Jan - 16 Feb	Thai Airways
23 Jan - 16 Feb	Thai Airways
24 Jan - 21 Feb	Thai Airways
20 Jan - 17 Feb	Thai Airways
24 Jan - 17 Feb	Thai Airways
20 Jan - 17 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 $551

Return flights