There are
2,537 mi
from Redwood City, CA to Ashland, KY
That's the driving distance. It would take 1 day 20 hours to go from Redwood City, California to Ashland, Kentucky.
The flight distance (direct flight from Redwood City, CA to Ashland, KY) is 2,140.82 mi.
2,537 mi = 4,082.35 kms