Los Angeles is about 2.4 times bigger than Warsaw.

Warsaw is approximately 517 sq km, while Los Angeles (including the city proper only) is approximately 1,215 sq km, making Los Angeles 135% larger than Warsaw.
Tip: This to-scale comparison of Warsaw vs. Los Angeles 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.