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

Return flights

01 Apr - 15 May	Air China
09 Apr - 16 Apr	Air China
01 Apr - 08 Apr	Air China
01 Apr - 31 May	SriLankan Airlines
24 Apr - 09 May	Air China
02 Apr - 21 Apr	China Southern
08 Apr - 18 Apr	Air China
04 Apr - 14 Apr	China Southern
02 Apr - 14 Apr	Air China
11 Apr - 25 Apr	Air China
11 Apr - 18 Apr	Air China
04 Apr - 08 Apr	Air China
25 Apr - 05 May	China Southern
22 Apr - 14 May	China Southern
21 Apr - 29 Apr	Air India
20 Apr - 18 May	China Southern
15 Apr - 13 May	China Southern
25 Apr - 09 May	China Southern
28 Apr - 03 May	Thai Airways
30 Apr - 06 May	Thai Airways

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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Seoul to Kathmandu in April from $357

Return flights