United Airlines says all of its domestic flights were grounded on Sunday because of a computer problem.
Company spokeswoman Maddie King said in a brief statement that it issued a ground stop in the U.S. because of an “IT issue.”
It wasn’t immediately clear how many flights were affected.
Around 9 p.m. last night, the airline issued a statement saying that the ground stop had been lifted.
Chicago-based United Airlines and United Express operate more than 4,500 flights a day.
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