There are
2,090 mi
from Redwood City, CA to Cahokia, IL
That's the driving distance. It would take 1 day 12 hours to go from Redwood City, California to Cahokia, Illinois.
The flight distance (direct flight from Redwood City, CA to Cahokia, IL) is 1,736.87 mi.
2,090 mi = 3,362.72 kms