Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 01:50 and arrives at Addis Ababa Bole International Airport at 06:30.
The flighttime is about 8h 40m. The distance travelled ("as the bird flies"): 6885 Km. So the average speed is roughly 794 Km.
There is an 4 hour time difference between Bangkok and Addis Ababa