Manchester Airport delays and cancellations hit flights after ATC fault

Passengers at Manchester Airport faced rolling delays and a growing list of cancellations on Monday, September 21, after an air traffic control technical issue in the UK’s northern network triggered traffic restrictions and a day of knock-on disruption.

What triggered disruption across the UK’s north

Published coverage indicates the issue originated at National Air Traffic Services’ (NATS) Prestwick centre in Scotland, where a connectivity problem affected part of the systems network used to manage air traffic. Restrictions were applied to regulate aircraft flows while the fault was resolved, a standard step designed to keep operations safe when capacity is constrained.

Reports indicate the technical issue was fixed later in the morning, but the recovery did not immediately restore normal timetables. Even after restrictions are lifted, airlines often need hours to rebuild flight rotations and crew schedules, and airports can face stand and gate congestion as inbound aircraft arrive out of sequence.

Multiple outlets reported that airports in Scotland, Northern Ireland and northern England experienced the most significant disruption, with Manchester among the locations showing repeated delays as traffic management measures rippled through the day.

Manchester’s departures board: which flights were delayed or cancelled

A “full list” of affected flights can change rapidly throughout the day as airlines update departure slots, swap aircraft, or cancel services when crews and planes fall out of position. As of late morning coverage, Manchester’s disruption included a mix of delayed short-haul departures, later-afternoon long-haul delays, and a smaller set of outright cancellations.

Published flight-status reporting from late morning indicated delays of more than 30 minutes affecting services including easyJet U22031 to Mahon; Aer Lingus Regional EI3323; Ryanair FR2569; Ryanair FR4076 to Alicante; Jet2 LS887 to Prague; easyJet U2709 to Belfast; Icelandair FI441 to Reykjavik; easyJet U22187 to Geneva; Ryanair RK8490 to Derry; easyJet U22135 to Bari; and Ryanair FR3242 to Beziers.

Later updates from the same published roundup showed continued delays into the afternoon and evening, including easyJet U22107 to Paris; Virgin Atlantic VS127 to New York; easyJet U26884 to Porto; easyJet U22009 to Tenerife; easyJet U22213 to Funchal; easyJet U22029 to Lanzarote; easyJet U22265 to Marrakesh; easyJet U22055 to Thessaloniki; Loganair LM698 to the Isle of Man; Ryanair FR641 to Valencia; easyJet U22015 to Alicante; and Ryanair FR4069 to Gdansk.

For cancellations specifically, published reporting listed easyJet U22113 to Paris, easyJet U2711 to Newquay, and Ryanair FR3238 to Brussels as cancelled at the time of that update, alongside the broader set of flights still experiencing rolling delays.

How widespread were cancellations nationally

Beyond Manchester, the day’s disruption extended across multiple airports and routes touching the UK’s northern airspace. Public reporting described delays and cancellations affecting services to and from Scotland and Northern Ireland, and into northern England, with wider network effects as aircraft and crews were displaced.

By late afternoon on September 21, analytics referenced in published coverage indicated 227 flights departing from or arriving into the UK had been cancelled, with Manchester among the airports seeing the most disruption alongside Belfast International, Edinburgh, and George Best Belfast City.

Separately published coverage characterized the incident as the second technical disruption in a fortnight for the UK’s air traffic control network, adding to traveler uncertainty about on-the-day reliability and recovery time once restrictions are lifted.

What passengers can do at the airport and before leaving home

For travelers due to fly out of Manchester, the most practical step is to re-check flight status repeatedly on the day of travel because an early “scheduled” listing can shift to “delayed” or “cancelled” as departure slots are recalculated. On disruption days driven by airspace restrictions, flight numbers and aircraft assignments can also change as airlines consolidate operations.

When a flight is delayed for extended periods, passengers can reduce the risk of missed connections by confirming whether onward flights are protected on the same booking, since rebooking obligations and protection differ when itineraries are split across separate tickets. Travelers connecting through hubs should also keep an eye on gate changes and updated boarding times, which can move as inbound aircraft arrive late.

With delays stretching across much of the day, passengers were advised in published airport guidance to check airline updates before traveling to the terminal, since arriving too early can mean long waits in departures, while arriving too late can be risky if an aircraft is able to depart sooner than expected once a slot opens.

Passenger rights: refunds, rebooking, and care during long delays

The UK Civil Aviation Authority’s guidance published on September 21 emphasized that airlines still have duties of care during delays and cancellations, including providing meals and refreshments appropriate to the length of the delay, and hotel accommodation when an overnight stay becomes necessary.

The CAA guidance also described disruption tied to the September 21 NATS Prestwick technical issue as likely to be considered “extraordinary circumstances” under passenger-rights rules, meaning compensation is unlikely for delays or cancellations directly caused by the incident. However, the same guidance stresses that airlines must still offer options when a flight is cancelled: a refund or rerouting at the earliest opportunity, or rerouting at a later date, depending on what the traveler chooses.

For passengers who end up paying out-of-pocket because an airline cannot proactively provide care or suitable replacement travel, the CAA’s published message indicates an expectation of prompt reimbursement for reasonable costs incurred in making necessary arrangements, based on the specific facts of the disruption.