September disruption linked to a Nats air traffic control issue has grounded flights across at least 15 UK airports.

Flights are grounded across at least 15 UK airports after a Nats air traffic control issue, with delays and cancellations hitting international travellers.
Flights have been grounded across parts of the UK on 2026-09-08 after Nats began tackling an air traffic control issue affecting at least 15 airports. The disruption is especially serious for international travellers because a single delay at a UK airport can quickly affect inbound aircraft, outbound departures and onward connections. Passengers due to fly today should not assume their service is operating normally, even if it still appears on an airport departure board. Airlines may continue updating schedules as airspace capacity changes and aircraft are repositioned.
Nats, the organisation responsible for managing UK air traffic control, is dealing with a technical or operational issue that has led to flights being grounded across at least 15 airports. When air traffic control capacity is restricted, airlines cannot simply depart at will; every aircraft movement must fit within a controlled flow of traffic. That means delays can build even at airports where terminals appear calm, because aircraft may be waiting for clearance, crews may be approaching legal working limits, or inbound planes may not arrive in time to operate their next route. The most important point for travellers is that the disruption is network-wide rather than limited to one airline.
The highest-risk passengers are those with international connections, late-day departures, tight transfer windows or journeys involving more than one airline. If your first flight leaves late, your onward carrier may not automatically hold the next aircraft, particularly on separate tickets. Travellers flying into the UK may also face arrival delays if aircraft are held at overseas airports before entering UK-controlled airspace. Families, cruise passengers, business travellers and anyone with visa, medical or event deadlines should act quickly to protect alternative arrangements.
Before setting off, check your airline’s app, the airline website, your booking email and the departure information from your airport. Flight-tracking websites can be useful, but they may show an aircraft location without confirming whether passengers will actually board or depart on time. If your airline says not to travel to the airport, follow that instruction and keep a screenshot or email as evidence. If the airline has not cancelled your flight but has issued a delay warning, leave extra time but avoid arriving so early that you become stuck in the terminal for hours without support.
If your flight is cancelled, your airline should usually offer a choice between a refund and rerouting, subject to the rules that apply to your ticket and route. If you are delayed for a significant period, airlines are generally expected to provide duty-of-care assistance such as food, refreshments and accommodation where necessary. Air traffic control problems are often treated as extraordinary circumstances, so fixed cash compensation may not apply in the same way as an airline-controlled technical fault. However, the lack of cash compensation does not automatically remove the airline’s responsibility to look after stranded passengers.
If you booked a through-ticket, the operating airline or booking carrier should be able to discuss rerouting if the disruption causes a missed connection. If you booked separate tickets, your protection is weaker because the second airline may treat you as a no-show if you do not arrive in time. Contact both airlines as soon as a delay appears likely and ask for written confirmation of your options. Travel insurance may help with missed connections, but insurers usually require evidence from the airline and proof that the disruption was outside your control.
Self-booking a replacement flight can be tempting, but it is not always the safest financial move. If your airline has cancelled your flight, ask it to rebook you first and keep notes of what you were offered, including times, routes and any refusal of care. If you buy a new ticket without giving the airline a chance to reroute you, reimbursement may become more difficult. A sensible compromise is to identify backup flights, rail routes or nearby airports in advance, then confirm with your airline or insurer before paying.
If you are already in the terminal, stay close to official airline updates and do not rely only on gate screens. Keep your phone charged, join digital customer-service queues where available and consider using airline social media support channels if phone lines are overloaded. Buy only reasonable food and drink while waiting, and keep every receipt in case you need to claim expenses later. If your flight is cancelled late in the day, ask the airline whether hotel accommodation and transport will be provided before arranging your own room.
For short-haul trips, look at nearby airports and rail alternatives, but compare the total journey time, baggage rules and onward transport before switching. For long-haul passengers, a reroute via a European hub may work, although availability can disappear quickly when many airlines are affected at once. If you are returning to the UK from overseas, check whether your accommodation can be extended by one night before rooms sell out. Travellers with medication, baby supplies or essential work equipment should keep those items in hand luggage rather than checked baggage whenever possible.
Even after the air traffic control issue is resolved, disruption may continue because aircraft, crews and passengers will not all be in the right place. Late-running inbound aircraft can delay evening departures, while crew-hour limits can force cancellations that were not visible earlier in the day. Airports may also experience longer queues at airline desks if multiple flights require rebooking at once. Travellers should monitor updates throughout 2026-09-08 and keep plans flexible until their aircraft has departed.
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