United Airlines largely operated on schedule Jan. 23 after a technology problem disrupted the Chicago-based carrier’s domestic network for more than two hours Jan. 22. A United spokesperson said the airline issued a ground stop for all domestic mainline flights from 5:30 p.m. Chicago-time Jan. 22 to around 8 p.m., citing an “IT issue.” The ground stop led to about 200 flight delays and 12 flight cancellations Jan. 22. The United spokesperson said that of 4,500 flights ...

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