Delta, United and American Airlines flights grounded due to communication issue, FAA says

All flights from several major US airlines – including Delta, United and American Airlines – were grounded Friday morning due to a communication issue, according to the Federal Aviation Administration.

The ground stop impacts all flights from the airlines, regardless of their destination, said the FAA.

Their grounding comes after a significant Microsoft outage brought Frontier Airlines to a standstill for hours on Thursday – though the ground stop for those airlines has since been lifted.

Earlier Thursday, Frontier said its systems had been impacted by the outage, and offered refunds to inconvenienced passengers.

Other competitors including Allegiant and SunCountry also said they were having difficulties, including with their booking, check-in and trip-managing functions online.
The FAA also announced Friday morning all Allegiant flights would be grounded.