Denver is about 1.5 times smaller than Chicago.

Chicago is approximately 590 sq km, while Denver is approximately 396 sq km, making Denver 67.22% the size of Chicago.
Tip: This to-scale comparison of Chicago vs. Denver 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.