El Paso is about 5 times smaller than Hanoi.

Hanoi is approximately 3,360 sq km, while El Paso is approximately 670 sq km, making El Paso 19.95% the size of Hanoi.
Tip: This to-scale comparison of Hanoi vs. El Paso 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.