American Airlines has accused United Airlines of reckless scheduling practices at Chicago O'Hare International Airport. American claims United is overscheduling flights to manipulate gate allocation rules and block competitor expansion.

These practices could cause significant operational disruptions, including delays and cancellations, during the peak summer travel season.

The Federal Aviation Administration (FAA) will cap total daily operations at the hub to mitigate travel risks. This conflict threatens United's growth strategy and operational performance at one of its primary hubs.