Buenos Aires is about 2.1 times smaller than Wichita.

Wichita (map shows its 73 named neighbourhoods; the area covers the whole city) is approximately 428 sq km, while Buenos Aires is approximately 203 sq km, making Buenos Aires 47.55% the size of Wichita.
Tip: This to-scale comparison of Wichita vs. Buenos Aires 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.