There are
1,877 mi
from Thornton, CO to Pinellas Park, FL
That's the driving distance. It would take 1 day 9 hours to go from Thornton, Colorado to Pinellas Park, Florida.
The flight distance (direct flight from Thornton, CO to Pinellas Park, FL) is 1,517.54 mi.
1,877 mi = 1.61 kms