There are
2,150 mi
from Mt Prospect, IL to Pacifica, CA
That's the driving distance. It would take 1 day 13 hours to go from Mt Prospect, Illinois to Pacifica, California.
The flight distance (direct flight from Mt Prospect, IL to Pacifica, CA) is 1,845.70 mi.
2,150 mi = 3,460.55 kms