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

Return flights

08 Apr - 21 Apr	Air China
18 Apr - 24 Apr	Air China
13 Apr - 27 Apr	Air China
13 Apr - 21 Apr	Air China
04 Apr - 14 Apr	Air China
14 Apr - 27 Apr	Air China
10 Apr - 21 Apr	Air China
11 Apr - 21 Apr	Air China
04 Apr - 02 May	Air China
14 Apr - 09 May	Air China
13 Apr - 08 May	Air China
02 Apr - 23 Apr	Air China
04 Apr - 17 Apr	Air China
15 Apr - 14 May	Air China
24 Apr - 02 May	Air China
29 Apr - 09 May	Air China
14 Apr - 05 May	Air China
01 Apr - 01 May	SriLankan Airlines
28 Apr - 05 May	China Southern
15 Apr - 06 May	China Southern

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 301€

Return flights