There are
2,880 mi
from Redwood City, CA to Elkton, MD
That's the driving distance. It would take 2 days 2 hours to go from Redwood City, California to Elkton, Maryland.
The flight distance (direct flight from Redwood City, CA to Elkton, MD) is 2,483.82 mi.
2,880 mi = 4,634.43 kms