Savannah is about 1.5 times smaller than Vienna.

Vienna is approximately 415 sq km, while Savannah is approximately 283 sq km, making Savannah 68.34% the size of Vienna.
Tip: This to-scale comparison of Vienna vs. Savannah 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.