Looking for some cheap late summer/fall vacation airfare out of Chicago? Right now, you can fly from Chicago to Atlanta for $188 round-trip, including all taxes, on Delta Airlines and AirTran. Nonstop Flights, No Min. Stay, Travel Between Aug. 23 – Dec. 14, 2011. Blackouts: September 1-5; And November 17-29, 2011. Tickets require a 10-day advance purchase. No minimum stay.