Flight Tacoma International Airport departs from Seattle Tacoma International Airport at 07:00 and arrives at Denver International Airport at 15:00.The flight has a short stop at San Francisco.
The flighttime is about 7h 00m. The distance travelled ("as the bird flies"): 1985 Km. So the average speed is roughly 284 Km.
There is an 1 hour time difference between Seattle and Denver