When you visit the city of Chicago, you will realize that there are multiple parking options in and around the O'Hare Airport. These parking spots are not reserved; they can be used by everybody. All the parking lots have varied parking rates.

Parking inside the Airport

http://www.airwise.com/airports/us/ORD/ORDpark.html

The parking spaces in the airport are offered to the person who comes first. If you want to park your vehicle on the airport's parking lots, you must be punctual. The parking payments are done when you are exiting the parking lot. You can book parking space by calling the relevant authorities.

Parking outside the Airport

There are some agencies that offer different parking services near the O'Hare airport at affordable rates. These parking areas are usually heavily guarded, so you can rest assured that you will find your car as you left it. The parking areas that are close to the airport include Park N Jet and Avistar Airport Parking.

http://www.airportparkingreservations.com/AirportSpecificPage?AirportID=9

There are many hotels near the O'Hare Airport which offer cheap and sometimes free parking spaces to their guests. These parking options in Chicago IL hotels are as valued as those that are found within and around the airport itself.

http://www.aboutairportparking.com/chicago-ohare-international-airport-parking