Flight Huanghua International Airport departs from Changsha Huanghua International Airport at 00:40 and arrives at Seoul Incheon International Airport at 04:45.
The flighttime is about 3h 05m. The distance travelled ("as the bird flies"): 1554 Km. So the average speed is roughly 504 Km.
There is an 1 hour time difference between Changsha and Seoul
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