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

Return flights

03 Oct - 13 Oct	Thai Airways
01 Oct - 13 Oct	Thai Airways
01 Oct - 11 Oct	Thai Airways
03 Oct - 10 Oct	Thai Airways
03 Oct - 11 Oct	Thai Airways
04 Oct - 11 Oct	Thai Airways
20 Oct - 13 Nov	Thai Airways
03 Oct - 04 Nov	Thai Airways
23 Oct - 29 Oct	Thai Airways
13 Oct - 01 Nov	Thai Airways
03 Oct - 04 Nov	Korean Air	direct
10 Oct - 17 Oct	Singapore Airlines
03 Oct - 13 Oct	Korean Air	direct
09 Oct - 14 Oct	China Southern
28 Oct - 04 Nov	Thai Airways
28 Oct - 04 Nov	Korean Air	direct
13 Oct - 01 Nov	Korean Air	direct

Also check the deals for one-way flights from Kathmandu to Seoul 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 Kathmandu to Seoul in October from 528€

Return flights