What's The Distance Between Chicago,Illinois And Berlin, Germany?

What you need to do is a mathematical equation having to do with the specific longitude and latitude points of both cities ad from there you can use an equation to determine the distance in air miles. If you go to www.astro.com you can get the exact coordinates and if I am correct they will walk you through the equation you then use for the most scientific answer in terms of distance that you're asking about. Hope that helps!