Size comparison

compared to

O'Hare Airport is about 5,257 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while O'Hare Airport is approximately 27 km² (11 sq mi), making O'Hare Airport 0.02% the size of Illinois.
Tip: This to-scale comparison of Illinois vs. O'Hare Airport uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: O'Hare Airport vs. Illinois

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See O'Hare Airport on top of Illinois
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