There are
1,685 mi
from Bowie, MD to Thornton, CO
That's the driving distance. It would take 1 day 6 hours to go from Bowie, Maryland to Thornton, Colorado.
The flight distance (direct flight from Bowie, MD to Thornton, CO) is 1,499.36 mi.
1,685 mi = 2,712.08 kms