Southwest has round-trip flights from Dallas (DAL) to Atlanta (ATL) for $102, NONSTOP. $51 each-way. Flights January to April. A few weekends available. Origin/Destination reversible. No Holidays. Expect prices to fluctuate by about +/- $10.
Note: You can save up to an additional $100 if you book your Flight+Hotel together as a package on Southwest Vacations, and use the DOM100 coupon-code at checkout.