Airport information booths are located in all terminals and are open from 8 A.M. to 8 P.M. daily. There's no shortage of taxis at O'Hare. If you are traveling light, the CTA train is the best. You can depart at Washington Street Station in the Loop and catch a taxi to your final destination. Look for the sign leading to the station beginning in the baggage-claim area.
Trains are frequent and reliable.
Look for the booth selling tickets for the bus as you leave the baggage-claim area. All major rental car companies have offices in the airport and downtown. All rights reserved.