There are almost an infinite number of ways to construct a flip flop thru-hike, and each has different advantages.
A flip flop thru-hike allows you to avoid the unpleasant conditions created when large numbers of hikers clump together in the backcountry. You'll be helping disperse the flow of hikers and helping preserve the natural environment of the Appalachian Trail.
You can hike the Trail in any sequence you wish, but make sure you know what kind of weather, terrain, and trail conditions to expect. The traditional thru-hike start time of March and the first half of April in almost areas present the possibility of winter conditions. In areas other than the southern end of the Trail, winter conditions will also be combined with solitude.
This blog post includes the perspective of this cohort of hikers taking innovative approaches:
Catch You on the Flip Side: The Thru-Hike Experience as Told by 2016 Flip Floppers.
Below are some suggested flip flop thru-hike itineraries.