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

Return flights

09 Oct - 20 Oct	Air India
09 Oct - 16 Oct	Air India
11 Oct - 16 Oct	Air India
11 Oct - 18 Oct	Air India
11 Oct - 20 Oct	Air India
11 Oct - 23 Oct	Air India
09 Oct - 18 Oct	Air India
16 Oct - 20 Oct	Air India
28 Oct - 09 Nov	China Eastern
21 Oct - 23 Oct	Air India
10 Oct - 18 Oct	Air India
21 Oct - 13 Nov	Air India
28 Oct - 07 Nov	China Eastern
24 Oct - 04 Nov	Air China
24 Oct - 08 Nov	Air China
15 Oct - 18 Nov	Air China
17 Oct - 18 Nov	Air China
20 Oct - 11 Nov	Air China
18 Oct - 11 Nov	Air China
10 Oct - 04 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 409€

Return flights