United says ground stop is lifted and it's working to resume flights. https://t.co/Ei3RZua7pd— Steven Romo (@stevenromo) January 23, 2017
Earlier Sunday evening, flights were grounded due to IT issues.
A ground stop is in place for domestic flights due to an IT issue. We?re working on a resolution. We apologize for the inconvenience.— United (@united) January 23, 2017
"We have issued a ground stop for all domestic mainline flights due to an IT issue. We are working as quickly as possible to resolve this issue and get out customers to their final destinations. We apologize for the inconvenience to our customers."
ABC13's Tim Heller was on a plane in Chicago experiencing delays and tweeted from a United plane.
Heller reported at 7pm that his pilot announced it would be at least another hour.