Hi missmac,
I don't have any info on southeast but we're useing AirTran out of Dayton in mid Nov. they have a once a day nonstop from Dayton to Orlando international, departs DAY at 7:30 am the return departs Orlando at 7:30 pm.
I got great rates for our trip $69 one way plus tax and charges per person, $606 round trip for 4 people. Check their web site if you feel like driving over to Dayton to start your trip. Prices vary daily on the site and they get higher the closer you get to departure date. airtran.com
Good luck!
Steve