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

Return flights

24 Apr - 06 May	Jeju Air
22 Apr - 03 May	SriLankan Airlines
03 Apr - 08 Apr	China Southern
15 Apr - 08 May	Air China
15 Apr - 14 May	Air China
21 Apr - 29 Apr	Air India
05 Apr - 24 Apr	Air India
10 Apr - 18 Apr	Air India
17 Apr - 25 Apr	Air India
21 Apr - 02 May	Air India
16 Apr - 23 May	China Southern
03 Apr - 11 Apr	China Southern
04 Apr - 11 Apr	China Southern
21 Apr - 25 Apr	Air India
11 Apr - 18 Apr	Air India
14 Apr - 28 Apr	China Southern
25 Apr - 05 May	China Southern
21 Apr - 02 May	Korean Air	direct

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

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 April from 373€

Return flights