There are
1,737 mi
from Hereford, TX to Sammamish, WA
That's the driving distance. It would take 1 day 6 hours to go from Hereford, Texas to Sammamish, Washington.
The flight distance (direct flight from Hereford, TX to Sammamish, WA) is 1,346.29 mi.
1,737 mi = 2,795.83 kms