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

Return flights

29 Oct - 16 Nov	SriLankan Airlines
15 Oct - 19 Oct	SriLankan Airlines
08 Oct - 19 Oct	SriLankan Airlines
18 Oct - 15 Nov	China Eastern
14 Oct - 23 Oct	China Eastern
23 Oct - 30 Oct	Sichuan Airlines
26 Oct - 06 Nov	Air India
30 Oct - 19 Nov	Air India
28 Oct - 13 Nov	Air India
28 Oct - 19 Nov	Air India
14 Oct - 19 Oct	Air China
06 Oct - 14 Oct	Air China
10 Oct - 17 Oct	Air China
08 Oct - 14 Oct	Air China
17 Oct - 18 Nov	Air China
16 Oct - 23 Oct	Air China
06 Oct - 17 Oct	Air China
26 Oct - 08 Nov	Air China
31 Oct - 19 Nov	Air China
31 Oct - 20 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.

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Cheapest return flights from Seoul to Kathmandu in October from 316€

Return flights