FAA Ground Stop Disrupts 66 Cancún Flights and Nearly 14,000 Passengers

Cancún, Quintana Roo — A nationwide failure of US air traffic control communications halted departures across the United States for more than four hours on Friday, disrupting 66 flights and the itineraries of 13,897 passengers at Cancún International Airport, the main gateway for foreign tourism into Mexico.

Airport operator Grupo Aeroportuario del Sureste (ASUR) reported that the disruption involved 52 departing flights with 10,924 scheduled passengers and 14 arriving flights carrying 2,973 travelers. The figures reflect people whose travel plans were exposed to changes; they do not mean all of those passengers were stranded at the terminal or that all 66 flights were permanently cancelled.

The affected flights were mainly connections to US cities including New York, Chicago, Miami, Atlanta, Houston, Dallas, Detroit and Boston. Canadian routes to Toronto, Montreal, Vancouver, Calgary and Edmonton were also hit because of the interdependence of North American air operations.

Early afternoon tallies put the number of delayed departures from Cancún at about 20. The count was later widened to 66 arrivals and departures as more information came in.

What Happened in the United States

The emergency began on Friday afternoon when the Federal Aviation Administration (FAA) ordered departures halted across US territory after technical problems disrupted communications between regional air traffic control centers. Officials said the decision was taken on operational safety grounds to avoid risks from the loss or degradation of the communications needed to coordinate aircraft movements.

During the suspension, thousands of aircraft stayed on the ground while planes already in flight received special instructions to continue their journeys or divert to alternative airports.

US Transportation Secretary Sean Duffy said the problem was linked to overloaded legacy communication systems whose analog infrastructure is deficient and requires deep modernization. US authorities said there was no indication of a cyberattack or a terrorist link to the interruption.

After running tests to confirm the stability of the systems, the FAA cleared departures again late on Friday night. Duffy warned that a return to normal would take time given the scale of the backlog.

Cancún’s Busy Friday Schedule

The outage hit on a heavy day for the Cancún terminal, which had 441 scheduled movements: 221 arrivals and 220 departures. The arrivals included 78 domestic and 143 international flights, while departures included 77 domestic and 143 international operations.

That means 286 scheduled movements — about 64.9 percent of Friday’s activity — were international connections. The 66 flights tracked during the contingency amounted to roughly 15 percent of the airport’s scheduled operations, though not all of them were necessarily cancelled or delayed to the same degree.

• Flights affected: 66
• Departures: 52, with 10,924 passengers
• Arrivals: 14, with 2,973 passengers
• Total passengers involved: 13,897

Reopening Does Not Clear the Backlog

Even with the FAA allowing departures again, operations from Cancún remained subject to a gradual recovery. ASUR said each aircraft needs the relevant authorizations before it can take off, and airlines must reorganize schedules and confirm the availability of pilots and crew.

One of the main problems created by the suspension is that crews’ permitted duty hours expired, which could force airlines to change personnel, reschedule flights or postpone operations. Aircraft that were held on the ground or diverted may also be out of position for their next routes.

As a result, the lifting of the US restrictions marks the start of normalization but does not guarantee that every flight scheduled from Cancún can leave immediately. Pending departures were still being cleared at the terminal as the first post-reopening reports came in.

Hundreds of Diversions Across the Region

The Cancún disruption was part of a much larger interruption that temporarily paralyzed a significant share of US airport activity. According to aviation analytics firm Cirium, at least 600 flights had been diverted in the first hours of the emergency: 496 returned to the airport they had departed from and 104 were sent to airports other than their original destinations.

About 11,000 flights capable of carrying more than 1.5 million passengers were scheduled in the United States after 4 p.m. Eastern time, reflecting the potential reach of the outage. Those figures refer to planned operations and passengers potentially exposed to the disruption, not confirmed cancellations or stranded travelers.

The contingency also affected cargo operations, international connections and travel by sports teams, while some airlines announced additional cancellations that could extend into Saturday.

Aging Infrastructure Under Scrutiny

The episode is one of the most serious nationwide groundings of US flights in decades. The closest precedent came in January 2023, when a computer failure in the system that issues notices to pilots forced a temporary halt to departures. Before that, a nationwide suspension of comparable scope followed the September 11, 2001, terrorist attacks.

Duffy acknowledged that part of the US system still depends on communications equipment, copper lines and technology developed decades ago. The US government is seeking additional resources to complete the modernization of air traffic control after Congress previously approved $12.5 billion for the work, and the federal administration has said another $30 billion is needed to continue the technological renewal.

Tourism Exposure in Quintana Roo

For Quintana Roo, the outage highlighted the state’s strategic dependence on air links to the United States, one of the largest sources of visitors to Cancún and the Riviera Maya.

The impact is not limited to passengers waiting for flights. Delays can disrupt hotel reservations, international connections, ground transfers and previously booked tourism services, and can generate extra costs for airlines, travel agencies and transport companies. No official economic estimate of losses specifically in Quintana Roo had been released.

Governor Mara Lezama said her administration was in contact with federal aviation authorities, the state Tourism Secretariat and ASUR to monitor the affected operations. The operational priority is now to recover schedules, reorganize pending departures and prevent accumulated delays from dragging into the weekend.

Aviation authorities advised passengers with trips booked to the United States or Canada to check the status of each flight directly with their airline before traveling to the airport.