Chicago, Illinois and Atlanta, Georgia are 719 miles apart. A city located halfway between them would be Bonnieville in Kentucky.
Atlanta
Halfway city between Atlanta and Charleston SC
The halfway point from Traverse City, MI. and Atlanta GA. would be Cincinnati, Ohio.
About Birmingham, AL
The halfway point between Atlanta and Fargo is Dunfermline, Illinois
Memphis, TN
Memphis, TN
Lexington, KY is about the halfway point.
Chicago has a larger population.
Philladaliphia
Dublin, GA is halfway between Savannah and Atlanta.