It's about a 15-16 hour drive from edwardsville, IL. (just across the river from you) to the Walt Disney World resort. atlanta is typically just over the half-way point of the trip. My experience is about 7 hours from atlanta to orlando( I usually set the cruise about 5 mph above posted speed limit). we usually do not make too many stops along the way(gas&potty) 2-3 times and usually one stop for sit-down restaurant. Our strategy is to leave st.louis area about 2-3pm which enables us to miss rush hour traffic in all major cities along the way(Nashville,chatanooga,atlanta). we usually pass through atlanta about 10-11pm. each year we plan on stopping about 1-2 hours south of atlanta and staying the night and finishing the trip in the morning, but, each and every year the same thing: I keep driving and we arrive at disney about 6am. at all cost: avoid morning rush hour in atlanta!!!