Boston is about 1.2 times bigger than Buffalo.

Buffalo is approximately 105 sq km, while Boston is approximately 124 sq km, making Boston 19% larger than Buffalo.
Tip: This to-scale comparison of Buffalo vs. Boston 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.