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- Newark Liberty International Airport has consistently ranked among the worst major U.S. airports for on-time performance. In the Federal Aviation Administration’s annual ranking of 30 major airports, Newark placed 28th in 2015, 30th in 2016 and 2017, 29th in 2018 and 2019, and 30th again in 2020.
- Newark’s apparent improvement by 2024 largely reflected deteriorating performance elsewhere. Its ranking rose to 17th out of 30 airports, but the improvement was attributed primarily to other airports becoming less punctual rather than Newark substantially improving its operations.
- Independent airport-quality studies have repeatedly ranked Newark last. The Wall Street Journal’s 2023 large-airport rankings placed Newark at the bottom, as did AirHelp’s 2025 index among American airports and J.D. Power’s 2024 North America Airport Satisfaction Study. These assessments considered broader measures of airport quality beyond flight punctuality.
- Newark’s performance varies substantially by season. Over the four years examined, October was its strongest month, averaging 15th place among 30 major airports for on-time performance, while March averaged 18th. Conditions deteriorated sharply during the summer.
- June and July are Newark’s most disruptive months. The reported on-time rates were approximately 65% in June and 62% in July. These months coincide with frequent thunderstorms that interfere with aircraft movements and airport ground operations.
- The Appalachian Mountains contribute to the New York region’s summer thunderstorms. Prevailing west-to-east winds carry warm, moisture-laden air from the Gulf of Mexico toward the mountains. As the air rises over the terrain, it cools and condenses into clouds, which continue eastward toward the New York metropolitan area.
- Warm afternoon air and Atlantic sea breezes help produce thunderstorms near New York. The interaction between moisture-bearing clouds, daytime heat, and cooler ocean air creates atmospheric instability that can trigger storms during the busiest periods of airport operations.
- Thunderstorms are particularly disruptive to aviation because of rapidly changing wind conditions. Sudden changes in wind direction and strength create hazards during landing and takeoff. Arriving aircraft may be instructed to hold, attempt another approach, or divert to another airport, while departing flights must often wait for storms to pass.
- Lightning can shut down essential ground operations even when aircraft remain capable of flying. Newark, like many American airports, suspends outdoor ramp activities such as baggage handling and aircraft pushback when nearby lightning presents a danger to workers. There is no single nationwide standard governing these shutdowns.
- Even a 20-minute ramp closure can disrupt flights throughout an airline’s network. Aircraft unable to unload passengers, receive baggage, leave gates, or depart on schedule can delay subsequent flights at Newark and other airports. The operational consequences can extend well beyond the original storm.
- New York’s other major airports face similar weather but generally perform better than Newark. John F. Kennedy International Airport and LaGuardia Airport frequently record below-average punctuality compared with other American airports, yet their performance has consistently exceeded Newark’s.
- JFK benefits from its location beside Jamaica Bay and the Atlantic Ocean. Thunderstorms generally travel from west to east, and the explanation presented is that they often weaken before reaching JFK. Cooler sea breezes can further reduce their intensity, giving JFK a geographical advantage over Newark.
- Newark has substantially less airfield space than airports handling comparable passenger volumes. JFK handles more passengers, while Houston and San Francisco serve as closer comparisons in traffic volume. Nevertheless, Newark occupies a considerably smaller airfield, restricting the infrastructure available to manage aircraft.
- Newark has three runways, but their layout prevents the airport from using all three independently. Its physical design limits how efficiently aircraft can land, depart, and move between runways and terminals, reducing practical capacity despite the apparent availability of three runways.
- Newark’s two primary parallel runways are separated by only 950 feet, or approximately 290 metres. Under normal operating conditions, the eastern runway generally handles arrivals and the western runway handles departures. Their proximity prevents the FAA from authorizing fully independent operations in all conditions.
- Aircraft movements on Newark’s parallel runways require coordination that restricts capacity. Depending on visibility, wind, weather, and the type of operation, controllers must manage simultaneous arrivals and departures, communication requirements, and minimum aircraft separation. These restrictions reduce the number of flights that the airport can process.
- JFK’s parallel runways are separated by thousands of additional feet, giving it greater operational flexibility. The wider spacing allows independent operations, or operations with fewer restrictions, under conditions that impose tighter limitations at Newark.
- Newark’s third runway cannot provide independent additional capacity because it intersects both primary runways. At most, two runways can operate simultaneously. Combined with the restrictions on the parallel pair, Newark can have less theoretical operating capacity than some airports with only two runways.
- Landing aircraft frequently must cross an active departure runway before reaching Newark’s terminals. Under a common landing configuration, aircraft approach the eastern runway from the north and leave through one of three high-speed taxiways. Because the terminals are west of the runways, arriving aircraft must cross the western runway.
- Runway crossings create an additional bottleneck for arrivals and departures. Air traffic controllers must coordinate taxiing aircraft with departing flights, introducing delays for inbound aircraft while temporarily reducing opportunities for departures. This can add several minutes to the movement of nearly every arriving aircraft using that configuration.
- Newark has little spare gate capacity during busy periods. From mid-afternoon into early evening, aircraft parking positions are tightly scheduled. Physical space limits terminal and gate expansion, making the number of available gates a major constraint on flight scheduling.
- Delayed departures can prevent newly arrived aircraft from reaching their gates. When an outbound aircraft remains parked longer than expected, the aircraft scheduled to use that gate cannot unload its passengers. The shortage of alternative parking positions turns an initial flight delay into an additional ground delay for another aircraft.
- July 14, 2025, demonstrated how severe weather and limited gate capacity can combine to paralyze Newark. Intense afternoon thunderstorms forced ramp operations to stop for substantial portions of the afternoon and early evening, producing prolonged delays for aircraft that had already landed.
- A United Airlines Boeing 767 arriving from Naples became a particularly striking example of the disruption. Aircraft N667UA completed a flight of 9 hours and 22 minutes from Naples, Italy, and landed at Newark slightly ahead of schedule at 6:07 p.m.
- The aircraft reached the airport but could not reach its gate. After leaving the landing runway via Taxiway November, turning north, and crossing the other runway, it stopped at approximately 6:13 p.m. because its assigned gate was unavailable.
- The United aircraft remained almost completely stationary for nearly four hours. It did not move again until 9:58 p.m. After that, it taxied a short distance, stopped for another 10 minutes, moved a few hundred feet farther, and stopped for approximately 15 additional minutes.
- Passengers aboard the Naples flight could not leave the aircraft until 4 hours and 21 minutes after landing. Although their flight arrived slightly early, the aircraft door did not open until approximately 10:28 p.m., illustrating the difference between an aircraft landing and passengers actually completing their journey.
- The gate delay also disrupted the aircraft’s scheduled return flight to Naples. The same Boeing 767 was supposed to operate United Airlines flight UA967 from Newark to Naples. Its prolonged ground delay threatened to push the outbound flight significantly behind schedule.
- United canceled UA967 rather than allow delays to cascade through subsequent flights. A late departure to Naples would have delayed the aircraft’s return to Newark the next day and potentially affected further scheduled services. Cancellation was therefore treated as the less damaging operational choice.
- The cancellation left more than 100 passengers without their planned flight to Italy. Available seats on the following day’s service were insufficient to accommodate everyone. Some travelers needed several days to find alternative routings, shortening their planned visits to Italy’s Amalfi Coast.
- Newark’s main weakness is its inability to absorb disruptions that other airports might manage more easily. Weather-related delays occur throughout the United States, but Newark’s runway restrictions, taxiway arrangements, and limited gate capacity magnify their effects.
- Spring and autumn provide more stable conditions because they generally avoid the worst winter and summer weather. Newark performs comparatively better when snowstorms and thunderstorms are less frequent. Its operational problems become most visible when external disruptions test the airport’s limited spare capacity.
- Air traffic control is a separate major source of Newark’s operational difficulties. Beyond its physical airport constraints, Newark has experienced chronic controller shortages, problems relocating its approach-control operations, and failures affecting radar information.
- New York’s airspace is among the world’s most complicated aviation environments. Controllers must coordinate traffic serving Newark, JFK, and LaGuardia while accommodating numerous smaller airports, private aircraft, helicopters, seaplanes, and aircraft passing through the region.
- Teterboro Airport adds substantial private-aviation traffic to the region. Located approximately 10 miles, or 16 kilometres, from New York City, it is one of the world’s busiest private-jet airports and lies within Newark’s broader approach environment.
- Manhattan generates unusually dense helicopter activity. The region accommodates sightseeing flights, airport transfers, and private helicopter journeys, including travel by wealthy residents between Manhattan and weekend properties in Westchester County and the Hamptons.
- Additional aviation activity further complicates New York’s airspace. Commercial seaplanes operate from the East River, general aviation uses a corridor along the Hudson River, commercial aircraft serve Westchester County Airport north of the city, and higher-altitude flights pass over the densely populated metropolitan region.
- The proximity of so many different aircraft operations places exceptional demands on controllers. Maintaining separation requires intense concentration, detailed local knowledge, and precise coordination. A momentary mistake in such congested airspace can have serious safety consequences.
- Controllers assigned to Newark require specialized experience beyond standard air traffic control training. Becoming an air traffic controller already involves years of preparation, but mastering Newark’s particularly complex airspace can require several additional years. Personnel commonly arrive after substantial experience controlling traffic in other sectors.
- Newark’s approach and departure movements are managed through Terminal Radar Approach Control, or TRACON. This system handles aircraft transitioning between high-altitude flight and landing, as well as aircraft leaving airports and climbing into the wider air traffic system.
- Newark’s TRACON controllers previously worked from a New York-area facility in Long Island City. That facility also supported the wider metropolitan approach-control operation rather than requiring controllers to work physically at Newark Airport.
- The FAA faced a severe shortage of controllers qualified to manage Newark’s airspace. Only 33 controllers were certified for an operation estimated to require 63, leaving it with approximately 52% of the intended staffing level.
- Controller shortages forced the FAA to restrict the number of aircraft entering Newark’s airspace. Because each controller can safely handle only a limited number of aircraft simultaneously, flights were held at their departure airports until sufficient capacity became available.
- The FAA proposed moving Newark’s TRACON operations to Philadelphia to address staffing difficulties. Since controllers work through radar displays and radio communications, officials reasoned that the same functions could be performed from an existing facility outside New York.
- Philadelphia was considered a more promising location for recruiting and training controllers. The FAA expected stronger training success rates, while the additional pay associated with controlling New York’s complex airspace could attract candidates already living in the Philadelphia area.
- The relocation also offered a potential financial advantage to controllers. Pay for managing Newark’s airspace would exceed the compensation associated with less complex Philadelphia-area sectors, while Philadelphia’s cost of living was lower than Long Island City’s.
- The FAA needed experienced Newark controllers in Philadelphia to train replacements. Moving the radar operation alone would not solve the shortage because new personnel still needed instruction from controllers already certified to manage Newark’s airspace.
- Only 17 of Newark’s 33 certified controllers voluntarily agreed to relocate. The FAA offered substantial bonuses and other incentives, but many controllers resisted because moving would uproot their families.
- The FAA eventually made relocation mandatory for affected controllers. Those unwilling to transfer to Philadelphia were told they would lose their jobs. Even after the ultimatum, some controllers declined to move.
- The relocated Newark TRACON operation began functioning in Philadelphia on June 20, 2024, with only 24 trained controllers. This was fewer than the 33 certified controllers available before the move and substantially below the estimated requirement of 63, further restricting airspace capacity.
- Moving air traffic control to Philadelphia introduced additional dependence on remote data connections. Radar information originated around Newark, passed through the former Long Island City facility, and was then transmitted to the Philadelphia TRACON operation.
- The radar transmission arrangement reportedly relied on aging copper telecommunications infrastructure without redundancy. The absence of an adequate backup meant that problems affecting the data connection could deprive controllers of the radar information necessary to track aircraft.
- Newark’s controllers subsequently experienced repeated radar-data blackouts. During these incidents, aircraft positions disappeared from their radar displays, leaving controllers temporarily unable to see where aircraft were located.
- Radio communication remained available during the reported radar failures. Controllers could still speak with pilots, but without reliable aircraft-position information, they lacked the situational awareness required to provide normal instructions confidently.
- One particularly serious radar blackout lasted as long as 90 seconds. Although no aircraft accident resulted, temporarily losing track of aircraft in such congested airspace created serious safety concerns.
- The radar failures compounded existing stress among Newark’s controllers. Staff had already endured years of extensive overtime in an occupation requiring sustained concentration and carrying considerable responsibility.
- Some controllers took trauma leave after the radar incidents. The combination of prolonged staffing pressure and frightening equipment failures led several controllers to step away from work temporarily, further reducing available staffing.
- The resulting absences created another capacity problem for Newark. With fewer qualified controllers available, the FAA had less ability to maintain normal traffic volumes safely, worsening delays and increasing pressure on the remaining personnel.
- The air traffic control crisis coincided with major runway maintenance in 2025. One of Newark’s two primary runways was temporarily unavailable, forcing arrivals and departures to share a single main runway and sharply reducing airport capacity.
- The combination of runway restrictions, controller shortages, radar failures, and seasonal thunderstorms contributed to Newark’s severe disruptions in May 2025. These overlapping problems produced an operational crisis significant enough to attract international news coverage.
- Newark’s operational failures arise from several connected limitations rather than one isolated defect. Closely spaced runways limit flight movements, runway crossings slow taxiing, scarce gates delay arriving aircraft, and controller shortages constrain the airspace itself.
- The problems reinforce one another when traffic is disrupted. Bad weather can delay departures, those delayed aircraft occupy gates, arriving aircraft remain stranded on taxiways, and the resulting disruption affects subsequent flights throughout airline networks.
- Newark is handling more traffic than its existing infrastructure can comfortably support. Its older, space-constrained airfield operates with little spare capacity, leaving it unusually vulnerable to weather, maintenance, staffing problems, and technical failures.
- The central conclusion is that Newark’s repeated breakdowns reflect structural limitations rather than simply bad weather or isolated management failures. Even relatively small disturbances can produce widespread delays because the airport lacks the operational flexibility needed to absorb disruptions without affecting the wider flight schedule.