There are
1,268 mi
from Thornton, CO to Gahanna, OH
That's the driving distance. It would take 22 hours 49 mins to go from Thornton, Colorado to Gahanna, Ohio.
The flight distance (direct flight from Thornton, CO to Gahanna, OH) is 1,167.33 mi.
1,268 mi = 1.61 kms