Originally Posted by
chipbennett
Just a minor point of clarification (especially if looking for this transportation at 4AM and not operating at peak mental capacity/in a pre-caffeinated state): at ATL, it is called the Plane Train, not the Sky Train. (Other airports/cities, e.g. Vancouver, do have a Sky Train.)
There's two different trains. The one being discussed is indeed the Sky Train. It is what one takes to get to Gateway hotels and car rental center.
The plane train is airside and takes you between concourses.