Ruth Haines
There are many reasons why airports may cancel flights, and it can be frustrating for passengers when this happens. From adverse weather conditions to technical issues, operational challenges, and even staff shortages, a range of factors can lead to flight cancellations. This introduction will explore the primary reasons behind flight cancellations and discuss the impact on passengers and the aviation industry. By understanding the causes, we can better prepare for and manage the consequences of cancelled flights.
| Characteristics | Values |
|---|---|
| Reason for cancellations | Staffing shortages, bad weather, technology issues, runway closures |
| Airports with highest cancellation rates | EWR, LGA, JFK, BUF, ORF, BOS, FLL, Hollywood Burbank, Chicago, New Orleans, San Jose, Las Vegas, San Francisco International, Buffalo Niagara International |
| Airports with lowest cancellation rates | GEG, TUS, KOA, BOI, PHX, SEA, SLC, ABQ, SMF, Ted Stevens Anchorage International |
| Advice for travellers | Book non-stop flights, ask about on-time performance, check real-time airport data, be aware of "creeping delays" |
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Staffing shortages
The impact of staffing shortages on flight operations is significant. When an airport faces a shortage of air traffic controllers, it results in a reduced capacity to manage air traffic. This, in turn, leads to a slowdown in departures and arrivals, causing delays and, in some cases, cancellations.
The problem of staffing shortages is not isolated to a single airport but seems to be a broader issue affecting multiple airports across different regions. For instance, airports on the East Coast of the United States, including EWR, LGA, JFK, BUF, ORF, BOS, and FLL, have been reported to have higher cancellation rates, which could be influenced by staffing shortages among other factors.
Additionally, specific airports like Hollywood Burbank Airport have experienced high cancellation rates, with an average cancellation rate nearing 10% due to various factors, including potential staffing shortages. Chicago, Buffalo, New Orleans, San Jose, and Las Vegas have also reported a high volume of flight cancellations, which could be partly attributed to staffing shortages.
To address these challenges, measures such as improving telecommunications connections, deploying backup systems, and conducting investigations to identify and rectify problems are being undertaken. These efforts aim to alleviate disruptions and ensure the safe and efficient management of air traffic, even amid staffing constraints.
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Bad weather
Severe weather events, such as hurricanes, typhoons, and thunderstorms, pose significant safety risks to aviation. Airports may cancel flights proactively to minimize the potential dangers associated with operating in such conditions. This includes the possibility of wind shear, which is a sudden change in wind speed and direction that can affect aircraft stability during takeoff and landing.
Beyond the immediate impact on airport operations, bad weather can also have knock-on effects on flight schedules. Delays caused by bad weather in one region can cascade throughout the airline network, leading to subsequent cancellations at other airports. This is particularly common during busy travel periods, where there is less flexibility in rescheduling flights.
Additionally, bad weather can cause disruptions to airport infrastructure and ground operations. Heavy snowfall or flooding, for example, may lead to the closure of runways or damage to airport facilities, making it unsafe for flights to operate. In such cases, airports may have no choice but to cancel flights until the infrastructure is repaired and safe conditions are restored.
It is important for passengers to stay updated on the status of their flights during periods of bad weather. While cancellations due to weather conditions are often beyond the control of airlines and airports, they can cause significant disruptions to travel plans. Passengers should refer to their airline's policies and weather forecasts to make informed decisions and minimize the impact of weather-related cancellations.
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Runway closures
The consequences of runway closures can be far-reaching, affecting not only the airport but also passengers and airlines. In the case of Newark Airport, the runway closure contributed to a week of delays and cancellations, causing significant inconvenience to travelers. Airlines were also impacted, with United pulling 10% of their flights from the airport.
To mitigate the impact of runway closures, airports may implement several measures. These can include improving telecommunications connections and technology, deploying backup systems, and upgrading air traffic control infrastructure. However, as noted by aviation experts, addressing overarching issues, such as the shortage of air traffic controllers and modernizing infrastructure, is crucial to preventing future disruptions.
While runway closures are sometimes unavoidable, effective planning and proactive measures can help minimize their impact on airport operations and passenger experiences. By prioritizing safety, adaptability, and continuous improvement, airports can enhance their resilience and reduce the occurrence of flight cancellations and delays attributed to runway closures.
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System outages
On July 19, 2024, a global outage associated with Windows computers caused flights to be grounded. All flights for major US airlines, including United Airlines, Delta Air Lines, and American Airlines, were grounded early on Friday, with the Federal Aviation Administration (FAA) citing communication issues. As of 10 a.m. ET, approximately 2,400 flights had been canceled globally, with about 25,000 delays.
The issue was attributed to a "prolonged third-party technology systems outage affecting multiple global industries," specifically involving Microsoft tech issues. This impacted the core reservation and check-in systems of several airlines, including AirAsia, Cebu Pacific Air, Qantas, Singapore Airlines, and LATAM Airlines.
Airports affected by the system outage included Amsterdam's Schiphol Airport, which experienced a "global system failure" affecting flights to and from the airport, and Paris Charles de Gaulle Airport, which saw slowdowns in check-ins, delays, and temporary suspensions of certain flight schedules.
In the United States, Hartsfield-Jackson Atlanta International Airport, Dallas Fort Worth International Airport, Chicago O'Hare International Airport, and John F. Kennedy International Airport experienced challenges and anticipated significant delays and cancellations due to the global computer outage.
While American Airlines resolved the issue and resumed operations, Delta and United Airlines only resumed some flights, with the FAA closely monitoring the situation and providing assistance to affected airlines.
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Air traffic delays
For instance, in May 2025, Newark Liberty International Airport experienced extensive delays and cancellations due to a combination of staffing shortages, outdated technology, unfavourable weather, and the closure of a busy runway. The Federal Aviation Administration (FAA) responded by slowing down arrivals to ensure safety, which resulted in further delays and cancellations.
Air traffic controller staffing shortages can have a significant impact on flight operations. In April 2025, air traffic controllers at the Philadelphia Terminal Radar Approach Control, responsible for Newark Airport, experienced a communications blackout of up to 90 seconds. This incident left controllers unable to communicate with pilots, highlighting the critical nature of adequate staffing in air traffic control.
Weather conditions also play a crucial role in air traffic delays. Unpredictable weather can affect not only local flights but also those in other regions, as adverse weather in one area can cause a ripple effect of delays and cancellations across the country.
Additionally, technological factors, such as system outages and ageing technology, can contribute to air traffic delays. This was evident in the case of Newark Airport, where ageing technology was cited as one of the issues.
To make informed travel decisions, passengers are advised to check real-time airport data, which provides valuable information on weather conditions and air traffic delays. Being aware of "creeping delays," where departure times are repeatedly pushed back, can also help travellers anticipate potential issues.
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