Cheapest return flights from Seoul to Kathmandu in September from $452

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

Return flights

26 Sep - 06 Oct China Southern
24 Sep - 03 Oct Air China
23 Sep - 04 Oct SriLankan Airlines
25 Sep - 05 Oct Air China
28 Sep - 15 Oct Air China
26 Sep - 14 Oct Air China
26 Sep - 15 Oct Air China
28 Sep - 16 Oct Air China
10 Sep - 12 Oct Air China
10 Sep - 13 Oct Air China
16 Sep - 24 Sep China Southern
09 Sep - 14 Sep China Southern
08 Sep - 12 Sep China Southern
01 Sep - 05 Sep Thai Airways
18 Sep - 23 Sep Thai Airways
11 Sep - 16 Sep Thai Airways
10 Sep - 15 Sep Thai Airways
10 Sep - 16 Sep Thai Airways
11 Sep - 15 Sep Thai Airways
12 Sep - 15 Sep Thai Airways

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

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