There are
1,073 mi
from Irvine, CA to Greeley, CO
That's the driving distance. It would take 18 hours 54 mins to go from Irvine, California to Greeley, Colorado.
The flight distance (direct flight from Irvine, CA to Greeley, CO) is 857.35 mi.
1,073 mi = 1.61 kms