10 min of rather random searching found this:
- CHA-ATL-HOU lv 0550 arrive 0923 $299
- HOU-ATL-CHS lv 1002 arrive 1454 $339
- CHS-ATL-CHA lv 1720 arrive 2120 $329
each one-way trip would have to be booked separately, since the layovers at both HOU and CHS are less than four hours and thus won’t show up in a multi-city search