There are
1,067 mi
from Greeley, CO to Pasadena, CA
That's the driving distance. It would take 18 hours 41 mins to go from Greeley, Colorado to Pasadena, California.
The flight distance (direct flight from Greeley, CO to Pasadena, CA) is 855.06 mi.
1,067 mi = 1,717.33 kms