Authorities issue ground stop for United Airlines flights: Media sources on August 6 reported that the Federal Aviation Administration issued a ground stop for United Airlines flights across the United States due to a technical glitch on the evening of same day. The ground stop was issued at major airports including Newark Liberty International Airport (IATA: EWR), Denver International Airport (IATA: DEN), George Bush Intercontinental Airport (IATA: IAH), and Chicago O’Hare International Airport (IATA: ORD). Sources indicate that at least 827 flights have been delayed and 23 have been canceled. The ground stop was lifted following the resolution of the issue at 21:00 local time on the same day, but delays continued through the evening.