A system-wide outage at United Airlines has grounded flights across major U.S. airports. Passengers report tarmac delays and ...

A system-wide outage at United Airlines has triggered a ground stop on all flights heading to Chicago, Denver, Newark, Houston, and San Francisco.

Travelers at airports in Newark, Chicago, San Francisco and Houston are facing delays due to a "technology issue," the ...

CHICAGO -- A ground stop has been issued for most United Airlines flights across the U.S., the FAA said.