There are
1,283 mi
from Thornton, CO to Saratoga, CA
That's the driving distance. It would take 22 hours 7 mins to go from Thornton, Colorado to Saratoga, California.
The flight distance (direct flight from Thornton, CO to Saratoga, CA) is 937.03 mi.
1,283 mi = 1.61 kms