There are
1,518 mi
from Tucson, AZ to Mercer Island, WA
That's the driving distance. It would take 1 day 4 hours to go from Tucson, Arizona to Mercer Island, Washington.
The flight distance (direct flight from Tucson, AZ to Mercer Island, WA) is 1,214.94 mi.
1,518 mi = 1.61 kms