Find great value on Airtran Airways flights from ATL to CHI when you book with CheapOair! Beautiful beaches, a penchant for art and historical architecture make Chicago one of the best holiday destinations in the world. Enjoy some romantic time at the Oak Street Beach with your partner or explore modern and contemporary art at the Art Institute of Chicago, the choice is yours. Head to the Shedd Aquarium which is home to more than 30,000 marine creatures and is one of the most famous attractions in Chicago. Don't miss beautiful skyline views of the city from Hancock Observatory which stands 1000 feet above the ground level.