There are
1,545 mi
from Downey, CA to Fremont, NE
That's the driving distance. It would take 1 day 2 hours to go from Downey, California to Fremont, Nebraska.
The flight distance (direct flight from Downey, CA to Fremont, NE) is 1,286.70 mi.
1,545 mi = 1.61 kms