There are
2,333 mi
from Dayton, OH to Sammamish, WA
That's the driving distance. It would take 1 day 17 hours to go from Dayton, Ohio to Sammamish, Washington.
The flight distance (direct flight from Dayton, OH to Sammamish, WA) is 1,947.87 mi.
2,333 mi = 3.22 kms