Spokane is about 1.9 times smaller than Portland.

Portland is approximately 346 sq km, while Spokane (map shows its 27 named neighbourhoods; the area covers the whole city) is approximately 178 sq km, making Spokane 51.51% the size of Portland.
Tip: This to-scale comparison of Portland vs. Spokane 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.