Spirit has round-trip flights from Houston (IAH) to Atlanta (ATL) for $69-$88, NONSTOP. Flights March, May, August, September, October, November, and December. Extended Weekends available. Origin/Destination reversible.
Note: Spirit fares do not include a free carry-on bag. Only a small personal item, like a Jansport City Scout backpack is free. You can avoid paying for seat selection if you accept the randomly assigned seat prior to boarding.