Ground StopNewsAmerican Airlines tech glitch triggers nationwide delaysWednesday, September 24, 2025United Airlines ground stop lifted after brief tech issueWednesday, September 24, 2025United Airlines ground stop: Unimatic glitch stalls flightsThursday, August 7, 2025Tech Glitch Triggers United Airlines Ground StopWednesday, August 6, 2025United Airlines lifts brief nationwide ground stopFriday, July 25, 2025