O'Hare Airport is about 6 times smaller than British Virgin Islands.

British Virgin Islands is approximately 151 sq km, while O'Hare Airport is approximately 27 km² (11 sq mi), making O'Hare Airport 18.14% the size of British Virgin Islands.
Tip: This to-scale comparison of British Virgin Islands vs. O'Hare Airport uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.