Liverpool John Lennon Airport: Flights Delayed After NATS Glitch 2026

Key Points

• A spokesperson at LJLA announced flight delay following a technical fault at the National Air Traffic Services (NATS) Prestwick center in Scotland.
• The disruption affected air traffic in north and central England, Scotland, and Northern Ireland; however, flights south of Manchester remained relatively unaffected.
• NATS confirmed the resolution of the technical fault at around 10.30am on Monday, September 21, 2026, although there were likely to be knock-on delays while regulations were lifted safely.
• At Liverpool John Lennon Airport, eight morning flights were delayed and three afternoon flights were cancelled including easyJet flights from Derry, Prague, and Nice.
• According to NATS, the issue was not connected to the software fault that led to more than 2,000 flight cancellations in the UK on September 8, 2026.
• Transport Secretary Heidi Alexander apologized for any inconvenience and advised passengers to seek information from their respective airlines.
• Flights by easyJet, British Airways, and Ryanair complained about the lack of NATS resilience. Ryanair wanted to see the resignation of the NATS Chief Executive Martin Rolfe.

Liverpool (Liverpool standard) September 21, 2026 – Flights at Liverpool John Lennon Airport (LJLA) and across the UK faced significant disruption on Monday morning after a technical issue at the National Air Traffic Services (NATS) Prestwick centre in Scotland triggered airspace restrictions over northern and central England, Scotland, and Northern Ireland.

As reported by Colin Lane of the Liverpool Echo, Liverpool John Lennon Airport released a statement at 10.14am on X confirming awareness of the ongoing technical issue regarding air traffic control operated by NATS at their Prestwick centre, which was affecting some flights and causing delays. The airport advised passengers to check with their airline for the latest information regarding flights.

According to FlightRadar24 data cited by the Liverpool Echo, dozens of flights arriving and leaving Liverpool were delayed, with eight morning departures affected and several afternoon arrivals also hit. NATS initially said engineers were on site investigating and working to resolve the issue, applying air traffic regulations to manage traffic demand while maintaining safety.

Which flights were cancelled or delayed at Liverpool Airport?

Liverpool John Lennon Airport published details of affected flights, with morning departures including a 9.45am service to Prague delayed to 10am, a 10.20am flight to Nice pushed back to 12.02pm, and a 10.50am service to Belfast cancelled altogether. Other delayed departures included flights to Derry (10.25am, now 11.23am), Dublin (10.55am, now 11.45am), Krakow (11.05am, now 1.35pm), and the Isle of Man (11.35am, now 12.45pm).

Arrivals into Liverpool were also disrupted, with a 9.15am flight from the Isle of Man estimated to land at 10.52am, a 9.35am service from Belfast at 11.29am, and a 9.55am flight from Paris at 10.46am. Further delays affected arrivals from Amsterdam (10.20am, now 11.41am), Dublin (10.30am, now 11.20am), Krakow (10.40am, now 12.44pm), and Palma (11.40am, now 12.32pm).

As reported by the Liverpool Echo in a later update, the 1.05pm easyJet flight from Derry, the 2.40pm easyJet flight from Prague, and the 3.45pm easyJet flight from Nice were all cancelled, with passengers instructed to contact their airline. Additional afternoon delays included the 1.05pm flight from Sofia (now 1.30pm), the 1.15pm from Krakow (now 3.05pm), and the 2.55pm from Dublin (now 3.55pm). The 3.45pm Ryanair flight from Liverpool to Dublin was delayed by one hour, and the 4.45pm Jet2 flight to Dalaman was rescheduled to 5.15pm.

How did NATS respond to the air traffic control failure?

NATS confirmed that the technical issue at its Prestwick centre was fixed shortly after 10.30am on Monday, September 21, 2026. In a statement, a NATS spokesperson said:

“The issue in our Prestwick centre is now fixed. We are working with airports and airlines to safely lift air traffic regulations as quickly as we can to minimise any further disruption.”

NATS emphasised that the problem was unrelated to the software defect that caused more than 2,000 flight cancellations across the UK on September 8, 2026. The organisation described the latest fault as a connectivity issue with part of its systems network, specific to operations in Scotland.

“We apologise to passengers for the disruption and thank them for their patience. Passengers should continue to check with their airline for the latest information on their flight,” NATS said in its statement.

What did airlines and government officials say about the disruption?

Transport Secretary Heidi Alexander posted on X shortly after 10.30am confirming that engineers had fixed the problem and systems were resuming.

“I know this will be deeply frustrating for passengers after the previous issue. There may be some delays as things reset. Please check with your airline for updates,” Alexander said.

Airlines expressed frustration at the repeated failures. An easyJet spokesperson told the Guardian:

“A Nats air traffic control system failure in its Prestwick centre is causing delays to flights with some unable to operate. This, once again, calls into question the resilience of Nats’s systems and demonstrates the need for firm actions to prevent these repeated failures.”

British Airways said: “Yet another technical fault with Nats means some of our customers are likely to experience disruption to their travel plans today. This is disappointing, and while it is an issue that is entirely out of our control, we’re doing everything we can to limit the impact on customers and are keeping them updated.”

Ryanair went further, repeating demands for the sacking of NATS chief executive Martin Rolfe. Neal McMahon, Ryanair’s chief operations officer, said:

“Just three days after Nats assured airlines and passengers that it had introduced robust ‘mitigation plans’, its flight data processing system has failed again. More than 25,000 Ryanair passengers have already suffered disruption, with over 140 Ryanair flights delayed.”

Background to the NATS Prestwick centre technical issue

The National Air Traffic Services (NATS) operates two main control centres in the UK: one in Swanwick, Hampshire, serving southern airspace, and one in Prestwick, Scotland, handling northern airspace including Scotland, Northern Ireland, and northern England. The Prestwick centre experienced a connectivity issue with part of its systems network on Monday, September 21, 2026, prompting the application of air traffic regulations to manage traffic demand while engineers investigated.

This incident came less than two weeks after a major software defect at NATS on September 8, 2026, which caused more than 2,000 flight cancellations across the UK and disrupted travel for hundreds of thousands of passengers. NATS has consistently stated that the September 21 issue is unrelated to the earlier problem, describing it as a separate connectivity fault specific to Scottish operations.

An initial report into the September 8 incident was released by NATS just three days before the latest failure, promising to “continually improve the critical service we provide”. The recurrence of technical problems has intensified scrutiny of NATS network resilience and raised questions among airlines and politicians about the adequacy of contingency measures.

Predictions: How this development can affect UK air travelers and airport operations

The repeated technical failures at NATS control centres are likely to have significant implications for UK air travelers and airport operations in the coming weeks and months. Passengers traveling through airports in northern England, Scotland, and Northern Ireland may face continued uncertainty, with airlines and airports advising travelers to check flight status before departing for the airport.

Industry analysts suggest that if NATS fails to demonstrate robust system resilience and effective mitigation plans, pressure will mount on the organisation and the Department for Transport to implement structural reforms, potentially including increased investment in backup systems and contingency protocols. Airlines such as Ryanair and easyJet have already called for firm actions to prevent repeated failures, indicating that carrier confidence in NATS infrastructure is eroding.

For Liverpool John Lennon Airport and other regional airports in the affected airspace, the knock-on effects of air traffic regulations may cause residual delays throughout the day even after the technical issue is resolved, as airports and airlines work to reset schedules and reposition aircraft. Travelers with connecting flights or time-sensitive arrangements should anticipate potential disruptions and maintain flexibility in their plans.

In the longer term, the September 21 incident may accelerate regulatory and parliamentary scrutiny of NATS governance and technical infrastructure, particularly given the proximity to the September 8 failure and the release of NATS’s initial report promising improvements. This could lead to mandated upgrades, independent audits, or changes to oversight arrangements aimed at restoring confidence in the UK’s air traffic control system among airlines, passengers, and international aviation partners.