AirHint found the following cheapest return flights from Seoul (ICN) to Kathmandu (KTM) in October 2025 (see full year).

Return flights

08 Oct - 19 Oct	SriLankan Airlines
11 Oct - 19 Oct	SriLankan Airlines
15 Oct - 19 Oct	SriLankan Airlines
29 Oct - 16 Nov	SriLankan Airlines
22 Oct - 09 Nov	SriLankan Airlines
21 Oct - 18 Nov	Air China
16 Oct - 23 Oct	Air China
16 Oct - 24 Oct	Air China
02 Oct - 14 Oct	Air China
01 Oct - 15 Oct	Air China
22 Oct - 05 Nov	Air China
24 Oct - 11 Nov	Air China
18 Oct - 09 Nov	Air China
25 Oct - 24 Nov	Air India
13 Oct - 17 Oct	Air China
17 Oct - 28 Oct	Air China
17 Oct - 24 Oct	Air China
22 Oct - 21 Nov	Thai Airways
29 Oct - 12 Nov	Air China
17 Oct - 09 Nov	Air China

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

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 October from 328€

Return flights