The mark consists of the shape of the City of Chicago map with the shape of O'Hare Airport attached to it. The map shape is inside of a circle. There are four 6-point stars. One small 6-point star is inside the circle positioned on the left side near the top of the map. It's not far from O'Hare Airport. Three larger 6-point stars are located on the right side of the circle with the larger one positioned on the top side of the map between the top of the map and top a three-dimensional rim. The other star is located between the top three-dimensional rim and the edge of the circle. The fourth 6-point star is positioned near the side of the second three-dimensional rim that's between the other two three dimensional rims. There are a total of 3 three dimensional rims with spokes. One three-dimensional rim with spokes appears to be pushing through the near bottom area of the map. The second three-dimensional rim with spokes is larger and floating above the rim that is pushing through the city map. The third three-dimensional rim with spokes is above the second rim and the largest of the three rims. The third rim appears to be floating above the other two rims and the city map.