Montreal is about 1.6 times smaller than El Paso.

El Paso is approximately 670 sq km, while Montreal is approximately 432 sq km, making Montreal 64.37% the size of El Paso.
Tip: This to-scale comparison of El Paso vs. Montreal 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.