There are
2,046 mi
from Lewisville, TX to Sammamish, WA
That's the driving distance. It would take 1 day 12 hours to go from Lewisville, Texas to Sammamish, Washington.
The flight distance (direct flight from Lewisville, TX to Sammamish, WA) is 1,649.35 mi.
2,046 mi = 3.22 kms