Honolulu is about 2.2 times smaller than Portland.

Portland is approximately 346 sq km, while Honolulu is approximately 157 sq km, making Honolulu 45.32% the size of Portland.
Tip: This to-scale comparison of Portland 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.