Can't say which I'd do, probably the July 3rd through Miami... BUT did you happen to look at the flights out of Chicago-Midway on AirTran? They offer non-stop service... you might have to play with your dates by a day to get nonstop both directions... Personally have not flown AirTran, but in the past we have gone out of Midway... Smaller airport is kind of nice... Good luck!