By Rajesh Kumar Singh 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.

The airline told the Sun the e-mail was sent to passengers who have upcoming flights to or through Newark’s airport, as well as its MileagePlus

United Airlines is offering to waive certain fees for customers who endured massive delays and cancellations at Newark Liberty International Airport. The airline announced Tuesday that customers affected by the disruptions are eligible to reschedule with no additional fees.

Caught in the middle of the issues at Newark is United Airlines, which is the most active airline at the New Jersey airport. While the problems lie with the FAA system, the airline is where people often aim their frustrations over cancellations and delays.

The Denver outage is the latest in a series of glitches that have put a spotlight on the nation’s aging air traffic control system.

In an email to customers on Monday, United CEO Scott Kirby assured them that "all the flights in and out of EWR (Newark) are absolutely safe." But for the airline, the timing of the chaos is ...

The FAA is working on a short-term fix to the problems at Newark Airport that includes technical repairs and cutting flights to keep traffic manageable while dealing with a shortage of controllers.

"We've turned the corner, and we have the commitment," United Airlines CEO Scott Kirby said of reforms to the Federal Aviation Administration.