US air travel thrown into chaos after nationwide ground stop halts flights

A nationwide FAA ground stop on all departing U.S. flights triggered widespread disruption to air travel across the United States, with carriers warning of knock-on delays to schedules and connections. The action was described as extraordinary and taken in the interest of safety as air traffic control communications issues prompted the halt, according to multiple outlets aggregating the event.

The FAA’s order paused outbound departures from airports nationwide, meaning aircraft already in flight would continue to their destinations under the last assigned clearances, while new takeoffs were withheld during the stoppage. Detroit Metro Airport in Romulus, Michigan, was among the airports identified as affected by the national pause, with coverage noting that departures were part of the broader action. The stoppage was characterized as temporary and under ongoing FAA review, with no immediately disclosed end time in the earliest advisories.

O’Hare International Airport in Chicago was highlighted as a notable carve-out within the nationwide pause, with departures held from 1:00 p.m. to 2:15 p.m. local time due to thunderstorms in the area. Weather conditions around the hub were described as mostly cloudy with rain and potentially gusty storms nearby in northwest Indiana, and officials indicated the possibility of extending the pause depending on evolving weather and the investigation.

Regional outlets reported that Reno-Tahoe International Airport and Reno-Stead Airport were also holding all departing flights at the FAA’s direction, illustrating the breadth of the disruption beyond the Chicago area. Passengers were urged to verify status with their airlines, as the grounding was described as temporary and not tied to a single incident. Dispatchers and airline operations were expected to rely on ATC Zero-style procedures for the duration of the halt.

Officials cited a communications issue affecting air traffic control centers as the root cause of the stoppage, a description echoed across CBS News, Global News, The Salt Lake Tribune, and other outlets. The situation was portrayed as evolving, with no specific end time announced in the initial advisories and international arrivals to be managed on a case-by-case basis as the FAA assessed next steps and investigators worked to determine a timeline for resuming normal operations.

Canadian outlets also noted a downstream impact, with Edmonton International Airport and Montreal-Trudeau International Airport reporting effects on U.S.-bound flights and suspensions or potential delays for travelers heading to the United States. CityNews Calgary and CTV News highlighted that several U.S.-bound departures from Canadian airports could be affected, and urged travelers to monitor status with their carriers as the situation developed.

After the halt, reports indicated that some international and cross-border flows would be managed as normal services resumed and that the restart would proceed gradually as systems and schedules were restored. The Salt Lake Tribune and Global News described the lift of the ground stop and noted that U.S. airspace had reopened, but cautioned that restarting operations would take time and require careful ramp-up to mitigate delays and a backlog of flights.

Transport Secretary Sean Duffy publicly stated that the nationwide ground stop had been lifted and that air travel was opening again, with the restart described as a careful, gradual process. France 24 summarized the end of the disruption, noting that officials clarified the incident did not stem from a cyberattack or a broad Microsoft outage, and that “old hardware” issues were among contributing factors affecting infrastructure. Observers across Canada and the United States were advised to anticipate continued delays as operations normalized.

Overall, the early reporting showed no confirmed incidents, injuries, fatalities, or aircraft accidents tied to the ground stop or the associated weather conditions. The action was framed as temporary and safety-related, with the FAA and other authorities continuing to investigate the root cause of the communications issue while aviation systems were restored to full capacity and schedules gradually recovered.