There are
1,613 mi
from Amarillo, TX to Greenbelt, MD
That's the driving distance. It would take 1 day 4 hours to go from Amarillo, Texas to Greenbelt, Maryland.
The flight distance (direct flight from Amarillo, TX to Greenbelt, MD) is 1,395.02 mi.
1,613 mi = 1.61 kms