Honolulu is about 2.5 times smaller than Denver.

Denver is approximately 396 sq km, while Honolulu is approximately 157 sq km, making Honolulu 39.52% the size of Denver.
Tip: This to-scale comparison of Denver vs. Honolulu 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.