Aurora is about 2.7 times bigger than Washington.

Washington is approximately 158 sq km, while Aurora (map shows its 53 named neighbourhoods; the area covers the whole city) is approximately 425 sq km, making Aurora 168% larger than Washington.
Tip: This to-scale comparison of Washington vs. Aurora 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.