There are
1,333 mi
from Garland, TX to New Carrollton, MD
That's the driving distance. It would take 1 day to go from Garland, Texas to New Carrollton, Maryland.
The flight distance (direct flight from Garland, TX to New Carrollton, MD) is 1,178.86 mi.
1,333 mi = 1.61 kms