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

Return flights

15 Apr - 26 Apr	SriLankan Airlines
02 Apr - 11 Apr	Vietnam Airlines
02 Apr - 10 Apr	China Southern
16 Apr - 24 Apr	Air China
24 Apr - 15 May	Air China
25 Apr - 09 May	Air China
14 Apr - 25 Apr	Air India
28 Apr - 05 May	Air China
14 Apr - 27 Apr	Air China
21 Apr - 29 Apr	Air India
21 Apr - 25 Apr	Air India
03 Apr - 11 Apr	China Southern
01 Apr - 08 Apr	China Southern
30 Apr - 09 May	Air China
05 Apr - 04 May	Air India
15 Apr - 02 May	Air China
06 Apr - 05 May	China Southern
27 Apr - 04 May	Air China
05 Apr - 03 May	Thai Airways
25 Apr - 16 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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Seoul to Kathmandu in April from $364

Return flights