There are
1,912 mi
from Decatur, IL to Palmdale, CA
That's the driving distance. It would take 1 day 9 hours to go from Decatur, Illinois to Palmdale, California.
The flight distance (direct flight from Decatur, IL to Palmdale, CA) is 1,637.55 mi.
1,912 mi = 3,077.19 kms