There are
1,073 mi
from Greeley, CO to Irvine, CA
That's the driving distance. It would take 18 hours 52 mins to go from Greeley, Colorado to Irvine, California.
The flight distance (direct flight from Greeley, CO to Irvine, CA) is 857.35 mi.
1,073 mi = 1.61 kms