San Antonio is around the same size as Los Angeles.

Los Angeles (including the city proper only) is approximately 1,215 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 6% larger than Los Angeles.
Tip: This to-scale comparison of Los Angeles vs. San Antonio 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.