FAA Orders Nationwide Ground Stop at All U.S. Airports After Communication Issues at En Route Centers

The FAA ordered a national ground stop at all U.S. airports "due to extraordinary circumstances and for reasons of safety." It is the second time since the 9/11 attacks that the agency has halted departures at all airports; the previous instance was in January 2023, following the failure of the Notices to Airmen (NOTAM) system.

In a statement Friday afternoon, the FAA said it "issued a nationwide ground stop for all U.S. airports following communication issues impacting multiple Air Route Traffic Control Centers," and that FAA technicians were investigating. Air Route Traffic Control Centers (ARTCCs) provide aircraft separation, traffic sequencing, routing assistance and airspace coordination for aircraft on IFR flight plans in controlled airspace, primarily during the en route phase of flight. There are 22 ARTCCs in the U.S.

An Air Traffic Control System Command Center advisory, since deleted, stated that by order of the Federal Aviation Command Center all airports were ground stopped, all departing traffic should remain ground stopped until further notice, and inbound international flights would be managed case by case.

Controllers across the country reported the stop. A ground controller at Seattle-Tacoma International Airport (KSEA), among the first to report it a little after 3:30 p.m., told a Southwest Airlines pilot that "we went into a national ground stop, all aircraft, with update unknown." Asked whether the stop was national in scope, the controller replied that across all en route facilities they were having communication issues, so all aircraft were ground stopped with no update time. A controller at Minneapolis-St. Paul International (KMSP) said at 3:44 p.m. EST that all airports were ground stopped.

A ground stop of this reach shows how much of U.S. air traffic depends on a handful of shared systems. When the en route centers lose communication, the FAA's safety response is to stop departures everywhere at once, not to isolate the affected region. Business aviation feels this the same way airlines do: an IFR departure from any airport waits on the same en route network.

The two nationwide halts since 9/11 came from different systems, the NOTAM failure in January 2023 and the en route communication problem now. That points to a general exposure in centralized ground infrastructure, not to a repeated fault in one component, and the FAA's description so far does not tie the two events together.

The next milestone is the FAA's own account of what disrupted communication across the centers and when departures were released. That explanation, from the agency whose technicians are investigating, will determine whether this reads as an isolated outage or as a weakness in how the 22 centers are linked.