San Antonio is about 14 times bigger than Miami.

Miami is approximately 92 sq km, while San Antonio (map shows its 401 named neighbourhoods; the area covers the whole city) is approximately 1,292 sq km, making San Antonio 1,299% larger than Miami.
Tip: This to-scale comparison of Miami vs. San Antonio uses the Mercator projection, which distorts the size of regions near the poles.
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