You have several options how to get to campus:

Cost: $30 Approx
Airport Express shuttles leave Chicago O'Hare International Airport every five to ten minutes. Tickets may be purchased at the kiosk outside of the International Terminal and at the lower levels of Terminals 1, 2, and 3 at the counters across from the baggage claim. Continental Airport Express also offers shuttles to northern suburban locations.
Airport Express: http://www.airportexpress.com/
Omega Shuttle: http://www.omegashuttle.com/

An easy form of transportation is a taxicab, which can be found on the ground level outside the arrival area of each terminal at O'Hare Airport.

The CTA trains are located at Terminal 2. If you arrive at another terminal, you will need to take the terminal trains to get to Terminal 2. Then, you will take the Blue Line to the Jackson stop and change to the Red Line towards Dan Ryan/95th. The IIT stop will be at Sox/35th Street. You will exit the train station towards 35th St.

An easy form of transportation is a taxicab which can be found on the ground level outside the arrival area of each terminal at Midway Airport

Follow the signs at Midway Airport to the CTA trains. Take the CTA Orange Line towards the Loop/Downtown until the Roosevelt stop. You will need to change to the Green Line train direction Ashland/63rd. The IIT stop will be at 35th/Bronzeville/IIT. This stop is located 1 block South from the IIT residential campus.