Cheapest return flights from Seoul to Kathmandu in September from $366

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

Return flights

02 Sep - 06 Sep SriLankan Airlines
09 Sep - 20 Sep SriLankan Airlines
30 Sep - 11 Oct SriLankan Airlines
11 Sep - 19 Sep China Southern
01 Sep - 05 Sep China Southern
08 Sep - 19 Sep China Southern
15 Sep - 18 Sep China Southern
15 Sep - 19 Sep China Southern
12 Sep - 15 Sep China Southern
07 Sep - 18 Sep Air China
23 Sep - 12 Oct Air China
10 Sep - 18 Sep Air China
26 Sep - 03 Oct Air China
24 Sep - 10 Oct Air China
29 Sep - 08 Oct China Southern
30 Sep - 08 Oct China Southern
30 Sep - 09 Oct Air China
30 Sep - 10 Oct Air China
19 Sep - 03 Oct Air China
29 Sep - 13 Oct China Southern

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

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