There are
1,368 mi
from Waterloo, IA to St Petersburg, FL
That's the driving distance. It would take 1 day 1 hour to go from Waterloo, Iowa to St Petersburg, Florida.
The flight distance (direct flight from Waterloo, IA to St Petersburg, FL) is 1,153.52 mi.
1,368 mi = 2,202.37 kms