Walk to the taxi stand in front of the University of Chicago Medical Center at the corner of Maryland Avenue and East 58th Street.
Call a cab from one of the main Chicago cab companies: Yellow Cab or Checker Cab. They can both be reached by dialing 312.829.4222. Plan to call at least an hour before your pick-up time.
Call the Quadrangle Livery Car Service to get a ride to airport. Their phone number is 773.418.8228. You can also email them at email@example.com. This is a private car service and the rates will be higher than taxi cab rates.