A good old-fashioned turf war is brewing between two major airlines at Chicago's O'Hare Airport. Why it matters: The feud ...

Both carriers claim airport as a hub—and fight via snarky billboards, social-media sniping and a lawsuit.

American may be fighting an uphill battle at O'Hare. United is based out of Chicago and considers itself to be the official ...

A lawsuit filed by homeowners argues the city has lost claim to the land by using it as a park. The city denies that, saying ...