What is the best way to get here from Ohare Airport? And which is the most cost effective? How much time should I plan to travel from McCormick back to the airport on a weekday afternoon?

About a 2 hour ride both ways From o'hare airport 90 East to 55 north

A. If there is a convention, there will be a convention bus to McCormick. Most conventions: free of charge. Otherwise: B. I would take a cab, Uber or Lyft, even if not cost effective. For public transport you must have exact instructions. C. Traffic on the different weekdays (afternoon) unfortunately are not equally distributed. Best to ask Hyatt at McCormick for the exact day.

Uber or Lyft, for sure.

I would not recommend a cab. Costwise, carpooling on uber or lyft is feasible.

Uber or Lift