The Chicago Department of Aviation (CDA) administers all aspects of two major airports – Chicago O’Hare and Midway International Airports.

For information on O'Hare and Midway International Airports

Information on the characteristics and the physical condition of the various elements of the public airports in Illinois as well as data on the actual use of both the publicly and privately owned airports in the state.

The O'Hare Modernization Final Environmental Impact Statement (EIS) is available online.

Includes aviation forecasts, airport financial reports, airport noise compatibility planning information, and more.