U.S. aviation officials have confirmed that the nation's airspace is safe and fully operational following a nationwide ground stop that caused significant travel chaos. This event marked the longest flight stoppage in 25 years, lasting more than four hours before ending around 8:15 p.m. ET on Friday. By that time, several domestic flights were permitted to resume operations from airports across the country.
The disruption has had a lingering effect on schedules. According to data from FlightAware, more than 6,400 of the 41,000 flights scheduled for Saturday had been canceled by the evening. Additionally, over 800 flights planned for Sunday were also scrubbed from the schedule. Despite these cancellations, authorities expect airline schedules to return to normal by the end of Sunday, allowing for a smoother start to the busy Thanksgiving travel period.
Secretary of Homeland Security Markwayne Mullin stated that there is no evidence to suggest the failure was caused by a cyberattack. He further assured the public that no lives were put at risk during the incident. The decision to ground flights was described as a precautionary measure taken when the system could not be quickly stabilized.
Officials in Bedford acknowledged the widespread disruption while emphasizing that safety remains the top priority. Apologies were issued to stranded travelers, and gratitude was extended to air traffic controllers, pilots, and flight attendants for their efforts in managing the situation. The administration expressed confidence in the system's current safety, noting that planes would have remained on the ground if any doubts had persisted.
Airlines are responding to the disruption by waiving change fees for affected passengers. Passengers with canceled flights are entitled to a full refund or free rebooking on another flight. The administration reported that it is working closely with carriers to ensure these policies are applied broadly. Some airlines have extended rebooking flexibility to travelers with reservations through Monday, though passengers are advised to contact their specific carriers for details.
The root of the problem was identified as an issue with system upgrades. Secretary of Transportation Sean Duffy explained that a contractor was replacing old, discontinued copper wire with new fiber wire in a remote location on Friday afternoon. This type of infrastructure work has been common across various industries for decades, but in this instance, a router began overloading the air traffic control system. The overload caused intermittent disruptions to communications and radar feeds, prompting the decision to ground all flights.
Duffy and other officials stressed that the stoppage was not the result of a total system outage or malicious activity by a foreign actor. Investigations are currently underway to determine whether contractor error or a faulty router was the primary cause. The incident occurred during a broader modernization effort that began last year after Congress approved $12.5 billion in funding. Officials reported that approximately 70% of the copper wire in the system has already been switched to fiber, with the White House pushing for an additional $30 billion to complete the remaining work.
The aviation disruption was confirmed to be unrelated to a separate massive outage affecting Microsoft services. Microsoft announced that its services were fully restored on Saturday. A company spokesperson noted that there was no indication linking the FAA ground stop to the service disruption that took Outlook, Teams, and other Microsoft 365 applications offline on Thursday. The issues with Microsoft services began around midday Thursday in the U.S. and impacted over 430 million users of its applications.
