Flight Hartsfield Jackson International Airport departs from Atlanta Hartsfield Jackson International Airport at 06:45 and arrives at Seattle Tacoma International Airport at 16:08.The flight has a short stop at Chicago.
The flighttime is about 12h 23m. The distance travelled ("as the bird flies"): 4195 Km. So the average speed is roughly 339 Km.
There is an 3 hour time difference between Atlanta and Seattle