O'Hare Airport is about 2 times smaller than Manhattan.

Manhattan is approximately 55 km² (21 sq mi), while O'Hare Airport is approximately 27 km² (11 sq mi), making O'Hare Airport 50.21% the size of Manhattan.
Tip: This to-scale comparison of Manhattan vs. O'Hare Airport uses the Mercator projection, which distorts the size of regions near the poles.
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