American Airlines is now suing the City of Chicago, arguing a plan to hand over roughly six O'Hare gates to archrival United is part of a plan to "marginalize" American and is a violation of its lease agreement.

Trade at Chicago’s O’Hare International Airport and New York’s JFK International Airport each increased more than 100% from the previous March, according to U.S.

Wednesday marked the first day that those looking to board domestic flights needed to present a Real ID​, passport, or military ID — or go through longer screening times.

United and American Airlines are clashing in court over gate assignments at O’Hare. Here's how a 2018 lease deal set the stage for the dispute.

The Illinois Department of Public Health (IDPH) is sounding the alarm on a potential measles exposure at Chicago O’Hare International Airport. Here's what you need to know.

The new flights represent continued growth for American, which says it will offer 25% more seats on flights out of O’Hare this summer.

A Chicago police report indicates the security scare happened during a shift change for TSA officers at the security checkpoint where the man entered the terminal.

Despite the May 7 deadline, passengers without the enhanced IDs — or other acceptable identification, such as a passport — were still allowed to board their flights with additional random security checks.