Moving air traffic controllers means retraining them on the quirks of a new facility, and the process can take years.

Travel woes at Newark Airport continued Monday after a weekend featuring another radar outage, a ground stop and dozens of flight cancellations and delays. The FAA announced Newark was operating on a ground delay program,

Transportation Secretary Sean Duffy said he has a plan to upgrade old air traffic control tech but warned more flight disruptions could come first.

CHICAGO (Reuters) -United Airlines is facing a financial hit and potential long-term reputational harm as flight delays and cancellations pile up due to ongoing disruptions at Newark airport - one of its largest hubs and among the busiest in the country.

A new software update prevented a third radar outage in the last two weeks at New Jersey's busy Newark airport when a telecommunications line failed again over the weekend, Transportation Secretary Sean Duffy said Monday.

Newark Liberty International Airport is facing another FAA-imposed ground delay due to staffing shortages, after a telecommunications issue led to delays on Sunday.

Newark Airport reportedly experienced another outage Sunday, resulting in a temporary ground stop at the facility. Newark has been besieged with problems over the last few weeks, including multiple air traffic control equipment outages and widespread delays and cancellations of flights.

With summer travel season approaching, the crisis at the New Jersey airport could mean weeks, if not months, of misery for travelers.