United Airlines grounded all flights for a portion of Sunday night due to an IT issue.
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
The ground stop was lifted around 9:00 p.m. and United says it is working on getting all flights out.
UPDATE: The ground stop has been lifted. We’re working to get flights on their way. We apologize for the inconvenience to our customers.
— United (@united) January 23, 2017
