Miles between Thornton, CO and Diamond Bar, CA

There are
1,001 mi
from Thornton, CO to Diamond Bar, CA

That's the driving distance. It would take 17 hours 27 mins to go from Thornton, Colorado to Diamond Bar, California.

The flight distance (direct flight from Thornton, CO to Diamond Bar, CA) is 814.47 mi.

1,001 mi = 1.61 kms