There are
1,855 mi
from Thornton, CO to Auburndale, FL
That's the driving distance. It would take 1 day 9 hours to go from Thornton, Colorado to Auburndale, Florida.
The flight distance (direct flight from Thornton, CO to Auburndale, FL) is 1,551.61 mi.
1,855 mi = 1.61 kms