United Airlines briefly interrupted flights across the country on Friday morning as a system failure was reported.
The airline has imposed a ground stop on all air traffic in the United States and Canada, according to the Federal Aviation Administration website.
In a statement made before 8 a.m., the airline said it had “experienced technical problems with the system” and that all systems were working normally again.
“We are aware of the problem and are working to resolve it as soon as possible,” wrote the company on Twitter, responding to consumer complaints. “We apologize for the inconvenience.”
Airlines occasionally pause flights, so-called ground stops, for technical reasons. Often times the stops are temporary and service resumes quickly, but not without delays and possibly even some cancellations. Sometimes a floor stop can be part of a more permanent disruption.