Delta, United, and Southwest have round-trip flights from Atlanta (ATL) to Indianapolis, Sarasota, Chicago, or Tampa (IND, SRQ, ORD, TPA) for $78-$137, NONSTOP. Flights September to December. Departures on Monday, Tuesday, Wednesday, Thursday, and Saturday. Extended weekends available. No Christmas dates available.
Tampa is the cheapest, with a $78-117 range. Other destinations are in the $117-$137 range.
A Carry-on bag and also a personal item is allowed for free on Delta. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.