Air traffic control staffing issues are cascading into major delays for passengers flying in and out of the busy Newark airport outside of New York City for an unprecedented fifth day in a row.

Staffing shortages at an air traffic control center have added to the effects of a runway closure, prompting United Airlines to cut flights at the hub.

Hundreds of United Airlines' Newark flights have been disrupted this week. The carrier blamed FAA technology and staffing for many of the disruptions. United Airlines issued travel waivers for affected customers.