AirHint found the following cheapest return flights from Hong Kong (HKG) to Seoul (ICN) in September 2026 (see full year).
Return flights
| 26 Sep - 30 Sep | HK Express | direct | |
| 25 Sep - 02 Oct | HK Express | ||
| 25 Sep - 02 Oct | Korean Air | direct | |
| 18 Sep - 25 Sep | China Southern |
Also check the deals for one-way flights from Hong Kong to Seoul in September.
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