Ottawa is about 1.8 times bigger than Sao Paulo.

Sao Paulo is approximately 1,523 sq km, while Ottawa is approximately 2,779 sq km, making Ottawa 82% larger than Sao Paulo.
Tip: This to-scale comparison of Sao Paulo vs. Ottawa 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.