Many flights have been delayed at the busy hub because of radar outages, shortages of air traffic controllers and construction on a runway.

Over the past two weeks, several equipment outages at the Philadelphia-based air traffic control center that guides planes to and from Newark Liberty International Airport, have raised questions on just how safe it is to fly at one of the nation’s busiest airports.

United Airlines on Tuesday said it expects flight issues to ease at Newark Liberty International Airport in the coming weeks as runway construction concludes and the Federal Aviation Administration considers cuts to the schedule.

Staff shortages and equipment failures at Newark Liberty International Airport have raised safety concerns in recent weeks.

Several times over the last year, Newark controllers lost radar or radio service, leaving them unable to talk with planes they were tracking.

Airline chief executives are poised to work with US aviation officials to throttle back more Newark airport flights, a fix that may ease short-term safety concerns but won’t solve long-term problems.

The Federal Aviation Administration is considering temporary flight reductions in and out of Newark Liberty International Airport, and it's launching a safety task force.

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