There are
2,896 mi
from St Petersburg, FL to Marysville, CA
That's the driving distance. It would take 2 days 3 hours to go from St Petersburg, Florida to Marysville, California.
The flight distance (direct flight from St Petersburg, FL to Marysville, CA) is 2,357.83 mi.
2,896 mi = 4,661.05 kms