Sinkhole Causes Runway Closure and Delays at LaGuardia Airport

This article is based on an official press release from LaGuardia Airport and the Port Authority of New York and New Jersey.

On Wednesday, May 20, 2026, operations at New York’s LaGuardia Airport (LGA) were severely disrupted after a sinkhole was discovered near an active runway. The sudden infrastructure failure forced an immediate shutdown of the affected tarmac, triggering widespread flight delays and cancellations across the region.

The incident occurred on Runway 4/22, a stretch of airfield already under intense federal scrutiny following a fatal collision between a commercial airliner and an airport fire truck just two months prior. The compounding issues of severe infrastructure concerns and recent safety failures present a significant challenge for Airports authorities.

With evening thunderstorms forecasted to strike the New York metropolitan area, the Port Authority has warned travelers to expect cascading disruptions and strongly advised passengers to verify their flight statuses directly with their respective Airlines.

Immediate Operational Impact and Delays

Discovery and Emergency Response

According to an official statement released by LaGuardia Airport, the sinkhole was identified at approximately 11:00 a.m. EST during a routine daily morning inspection of the airfield conducted by Port Authority crews. Upon discovery, officials immediately halted all operations on Runway 4/22.

The Port Authority confirmed that specialized teams were quickly deployed to the site to assess the structural damage. In their public statement, the agency noted:

emergency construction and engineering crews are onsite to determine the cause and complete necessary repairs as quickly and safely as possible.

The exact cause of the sinkhole remains under active investigation by onsite engineers, and no timeline has been provided for when the runway might reopen.

Cascading Flight Cancellations

The closure of a primary runway at one of the nation’s busiest airports immediately bottlenecked air traffic. The Federal Aviation Administration (FAA) intervened shortly after the discovery, implementing a traffic management program that slowed incoming flights to LaGuardia. According to FAA tracking data, average arrival delays for airborne aircraft quickly reached one hour and 37 minutes.

Data from flight tracking service FlightAware showed that as of 2:45 p.m. EST, LaGuardia had registered 196 flight cancellations and 191 delays. Delta Air Lines, which operates as the largest carrier at LaGuardia and accounts for approximately 40 percent of the airport’s total flights, has been heavily impacted by the operational constraints.

A Troubled Runway and Infrastructure Concerns

The March 2026 Fatal Collision

The emergence of a sinkhole on Runway 4/22 adds another layer of crisis to a tarmac that is already the subject of an ongoing federal investigation. On March 22, 2026, the exact same runway was the site of a fatal collision between Air Canada Express Flight 8646, a Bombardier CRJ900 passenger jet, and a Port Authority fire truck.

That crash resulted in the deaths of the aircraft’s two pilots, 24-year-old Antoine Forest and 30-year-old Mackenzie Gunther, and left approximately 40 people injured. A preliminary report from the National Transportation Safety Board (NTSB) highlighted severe communication failures leading up to the 104-mph collision. The NTSB also noted that the airport’s surface monitoring system was hindered because the fire truck lacked a transponder.

Historical Geography and Sinking Runways

Beyond the recent safety incidents, LaGuardia faces long-term geographical and structural challenges. Historically, much of the airport’s footprint, stretching from Flushing Bay to Corona Park, was constructed directly over wetlands and swamps. This underlying geography makes the land inherently susceptible to shifting, settling, and the formation of sinkholes.

A recent report cited by The Guardian underscored these alarming structural issues. According to the publication’s findings, approximately 3.5 million square meters of the airport’s runway surfaces are currently experiencing “significant sinking.” Furthermore, the report identified nearly 14,000 square meters of tarmac as being at “high risk of structural damage.”

AirPro News analysis

We observe that the Port Authority is currently navigating a perfect storm of operational and public relations crises. Managing a sudden infrastructure failure on the very same stretch of tarmac that claimed two lives just eight weeks ago raises urgent questions about the long-term structural viability of LaGuardia’s airfields. The combination of historical wetland geography, documented reports of widespread runway sinking, and the immediate loss of Runway 4/22 suggests that piecemeal repairs may no longer be sufficient. Furthermore, the blend of a closed runway, a major airline hub disruption, and severe weather creates a highly volatile situation for consumers, likely resulting in cascading delays that will stretch well into the latter half of the week.

Frequently Asked Questions

What should travelers flying out of LaGuardia do?

The Port Authority strongly encourages all travelers to check directly with their airlines for the latest flight status information before heading to the airport. With forecasted thunderstorms expected to compound the existing runway closure, passengers should anticipate significant delays and potential cancellations.

Why is LaGuardia Airport prone to sinkholes?

Much of LaGuardia Airport was built on former wetlands and swamps. This geographical foundation makes the underlying soil more susceptible to shifting and settling over time, which can lead to structural issues like sinkholes, especially under the immense weight and stress of commercial aircraft operations.

Sources:

• LaGuardia Airport / Port Authority of New York and New Jersey (Official Press Release)