LaGuardia Sinkhole + Storm = Memorial Day Travel Nightmare — Hundreds of Flights Canceled, Delays Spreading Nationwide

LaGuardia's Runway 4/22 closure from Wednesday's sinkhole combined with the overnight severe thunderstorm to trigger hundreds of cancellations spreading as far as Chicago, Atlanta, and Dallas. Long Island travelers face a brutal pre-Memorial Day morning.

Updated May 21, 2026
Dr. Dao Yuan Han Dr. Dao Yuan Han Data Editor & Lead Analyst
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Updated 9:54 PM — Wednesday, May 20, 2026. What began as a Wednesday morning sinkhole discovery at LaGuardia Airport has cascaded into a pre-Memorial Day travel catastrophe. Runway 4/22 remains closed until at least Thursday morning. The overnight severe thunderstorm is now compounding single-runway operations, triggering hundreds of cancellations and delays that are rippling across the country. Long Island travelers face a brutal Thursday.

The Double Hit: Sinkhole by Day, Storm by Night

LaGuardia Airport is running on one runway heading into one of the busiest travel weekends of the year — and now it’s doing so in the dark, in a thunderstorm.

The sinkhole that appeared near Runway 4/22 during a routine morning inspection Wednesday at 11:00 AM was already a serious disruption. By the time the severe thunderstorm that pummeled New York City, Brooklyn, Queens, and Long Island with 60-70 mph winds and flash flooding arrived Wednesday evening, it hit an airport already operating at half capacity.

The Port Authority confirmed Runway 4/22 will remain closed until Thursday morning, May 21. With the overnight storm reducing visibility, triggering lightning holds, and further squeezing what a single-runway operation can absorb, the damage is compounding rapidly.

As of 4:00 PM Wednesday — before the storm even hit — 101 flights to LaGuardia had already been canceled and 139 more were delayed, according to FlightAware. That number has climbed through the evening as storm-related Ground Delay Programs restricted the flow of inbound aircraft even further.

National Ripple: Chicago, Atlanta, Dallas Hit

LaGuardia’s disruption doesn’t stay at LaGuardia. The airport occupies a unique position in the U.S. flight network as a major East Coast hub serving some of the country’s most heavily traveled routes. When LGA goes down to one runway during peak operations, the math is unforgiving: less throughput means more holds, holds mean delayed aircraft, and delayed aircraft means every downstream connection in every carrier’s network falls behind.

The ripple has already spread to Chicago O’Hare, Atlanta Hartsfield-Jackson, and Dallas-Fort Worth — three of the country’s four busiest hub airports. Passengers on connecting itineraries through LGA are arriving late to connections, or not arriving at all.

For Long Islanders who drive to LaGuardia rather than JFK, this creates a decision point tonight and Thursday morning: stay the course and expect significant delays, or pivot to JFK (which has not reported comparable infrastructure issues) and accept the longer airport experience.

The Runway Itself: A Haunted Strip of Tarmac

There is a reason Runway 4/22 carries particular symbolic weight in the current news cycle. This is the same strip of asphalt where, in March 2026, an Air Canada jet collided with a Port Authority fire truck while landing — a crash that killed both pilots and injured dozens of passengers. The March incident triggered an FAA investigation into LaGuardia’s ground traffic management protocols and the coordination between tower and operations crews during fire response.

Now, two months later, the same runway is again at the center of a crisis — this time with the ground literally giving way beneath it. The Port Authority has not yet announced a cause for the sinkhole, but multiple infrastructure analysts have pointed to LaGuardia’s geological reality: the airport was built on reclaimed land adjacent to Flushing Bay and Bowery Bay, on ground that was literally marshland and tidal flats a century ago. The subsurface below the airport is a patchwork of fill, sediment, and engineered support structures that have been under continuous stress from aircraft loads for 80-plus years.

The severe storms hitting the region this spring — including tonight’s — accelerate subsurface water movement and can undermine the soil stability beneath aging infrastructure. Geotechnical engineers familiar with the airport’s construction history have long flagged the fill layer as a latent vulnerability. Tonight’s heavy rain, falling on an airport already managing a sinkhole repair, is not a neutral variable.

What Long Island Travelers Need to Know Right Now

If You’re Flying Through LaGuardia Thursday Morning

The runway is expected to reopen by 10 AM Thursday, per NBC New York. That’s a best-case estimate made before the overnight storm added construction complexity. Treat it as an optimistic floor, not a guaranteed ceiling.

What to do:

  • Check your airline app first thing Thursday morning — many carriers have issued travel waivers that allow free rebooking to Friday or Saturday
  • If your airline has issued a waiver, use it proactively rather than waiting standby in a chaotic terminal
  • If you must fly Thursday, arrive at least 2.5-3 hours early and factor in the storm’s effect on Queens road access — the Belt Parkway and Van Wyck Expressway approaches to both LGA and JFK can flood
  • JFK is a viable alternative for many LGA routes — American, Delta, and United all maintain JFK service to most domestic destinations; compare options on your carrier’s app

The Memorial Day Factor

The Port Authority was already warning of over 2 million passengers expected through New York area airports over the Memorial Day weekend before the sinkhole or storm entered the picture. With one runway at capacity-constrained LaGuardia, that volume simply cannot move at its planned rate. If the runway reopens Thursday morning as promised, there will still be a backlog to clear before normal scheduling can resume.

Airlines are already over-booked across the weekend. Any additional delay to Thursday operations — including weather holds from residual storm activity — creates a structural shortage of aircraft and crews heading into the weekend.

Bottom line: If you can be flexible on Memorial Day weekend travel, even shifting by one day can dramatically reduce your exposure to this backlog.

Long Island Is Ground Zero for Travel Disruption This Week

It’s worth stepping back and naming what this week has become for Long Island and the greater New York region. In less than seven days:

  • May 14: A sinkhole on the Long Island Expressway in Melville, approximately 10 feet wide and 8 feet deep, swallowed a car and closed westbound lanes
  • May 16-19: The first LIRR strike since 1994 shut down commuter rail service for 300,000 daily riders over four days
  • May 19, noon: LIRR service restored, with full service resuming at 4 PM
  • May 20, 11 AM: LaGuardia Runway 4/22 shut down after sinkhole discovered; 101+ flights canceled, 139+ delayed
  • May 20, ~3 PM: A school bus carrying 39 children became trapped in a sinkhole on East 180th Street in the Bronx; no injuries
  • May 20, 6:28 PM: NWS issues Severe Thunderstorm Warning for Brooklyn, Manhattan, Staten Island
  • May 20, 8:35 PM: Shelf cloud rolls over Long Island as storm crosses Nassau-Suffolk border
  • May 20, 8:45 PM: NJ Transit suspends service at Penn Station due to brush fire near Hudson tunnels
  • May 20, 9:24 PM: Staten Island Railway suspended between Prince’s Bay and New Dorp; Outerbridge Crossing blocked
  • May 20, ongoing: 60-70 mph wind gusts and flash flooding close all lanes of I-495 at 188th Street in Queens, flood Hempstead and Hillside Avenues, and knock out power to thousands

The frequency of sinkhole incidents — three in one week, across different boroughs and road types — is particularly notable. It reflects what infrastructure experts have been warning about for years: New York’s aging underground systems are failing under the combined stress of aging pipes, saturated soil, and increased storm intensity. The LaGuardia sinkhole appearing on the same runway where a fatal crash occurred two months ago is a confluence of bad luck and deferred maintenance that the Port Authority and FAA will be answering questions about for months.

LaGuardia’s Structural Vulnerability

LaGuardia opened in 1939 on 105 acres of filled marshland. Eighty-seven years of continuous aircraft operations — with maximum takeoff weights that have more than doubled since the airport opened — have transferred enormous cumulative load onto a subsurface that was never natural solid ground to begin with.

The $8 billion LaGuardia reconstruction project that redeveloped the Central Terminal Building was completed in recent years, but runway and subsurface infrastructure was not part of that renovation scope. The runways last received major structural work over a decade ago. Geotechnical surveys conducted as part of airport master planning have noted settlement patterns consistent with soft fill compaction — a long-term process that gets dramatically accelerated by water infiltration.

This week’s sinkhole is not a random event. It is an outcome.

Road Access to LaGuardia: Storm Degraded

For Long Islanders driving to LGA Thursday morning, the Queens approach routes were significantly disrupted by Wednesday night’s flooding:

  • I-495 (LIE) at 188th Street/Fresh Meadows was closed to all traffic in both directions Wednesday evening due to flash flooding; check 511ny.org for current status before departing
  • Hillside Avenue and Hempstead Avenue in eastern Queens were heavily flooded as of 9 PM
  • The Van Wyck Expressway (primary LGA/JFK access corridor) should be checked via Google Maps or Waze for overnight flooding recovery before departing

Allow extra time. Give yourself a buffer. The storm will have cleared by early Thursday morning, but residual water and debris may still affect travel times.

Monitoring & Resources

Long Island Traffic will update this article as repair status and cancellation numbers develop Thursday morning.

Sources

Topics

LaGuardiasinkholeairportflight delayscancellationsMemorial Daysevere thunderstormLong Island travelQueensPort Authorityinfrastructure crisisLaGuardia airport cancellations May 21 2026

Frequently Asked Questions

What should I do if I'm in a car accident on Long Island?

Call 911 immediately if anyone is injured or if the vehicles can't be moved safely off the roadway. Stay at the scene — leaving the scene of an accident with injuries is a crime under New York Vehicle and Traffic Law §600. Exchange license, registration, and insurance information with every other driver involved. Take photographs of every vehicle, the position of the vehicles before they're moved, all license plates, the road surface, traffic signs, and any visible injuries. Get the names and phone numbers of every witness — police often won't capture bystander witnesses on their own. Seek medical attention within 24 hours even if you feel fine; soft-tissue injuries and concussions can take a day or two to present, and a delayed medical visit weakens an injury claim. In Nassau County, NCPD responds outside of incorporated villages. In Suffolk County, SCPD covers the five western towns; East End towns have their own forces. New York State Police Troop L responds to accidents on state highways across both counties.

How long do I have to file a no-fault claim in New York?

Thirty days. New York Insurance Law §5102 requires you to file a Personal Injury Protection (PIP/no-fault) application with the insurer of the vehicle you were in (or, if you were a pedestrian or cyclist, with the insurer of the striking vehicle) within 30 days of the accident. Missing the 30-day deadline can void your no-fault benefits — that's up to $50,000 in medical bills and 80% of lost wages (capped at $2,000/month) per injured person. The form is the NF-2 application; your insurance carrier provides it on request. New York no-fault is a true PIP system: it pays regardless of who caused the crash.

What counts as a "serious injury" under New York law?

Under Insurance Law §5102(d), a "serious injury" is one that meets at least one of these categories: (1) death; (2) dismemberment; (3) significant disfigurement; (4) a fracture; (5) loss of a fetus; (6) permanent loss of use of a body organ, member, function, or system; (7) permanent consequential limitation of use of a body organ or member; (8) significant limitation of use of a body function or system; or (9) a medically determined injury that prevents the injured person from performing substantially all daily activities for at least 90 of the first 180 days following the accident. Only injuries that meet one of these nine categories create the right to sue the at-fault driver for pain and suffering damages — short of that threshold, recovery is limited to no-fault PIP benefits. Disputes over whether an injury meets the threshold are the single most-litigated issue in NY motor-vehicle cases.

How long do I have to sue after a Long Island car accident?

Three years from the date of the accident for personal injury claims under CPLR §214(5). Wrongful death claims have a two-year deadline under EPTL §5-4.1. If a government entity is involved (a county vehicle, a road defect on a state highway, a defective traffic signal, a county bus), you must file a Notice of Claim within 90 days under General Municipal Law §50-e — that's a non-negotiable jurisdictional deadline, and missing it usually bars the claim entirely. Property-damage-only claims have the same three-year clock. The clock starts on the day of the accident, not the day you discover the full extent of an injury.

Can I still recover compensation if I was partly at fault?

Yes. New York is a pure comparative negligence state under CPLR §1411. Even if you were 90% at fault, you can still recover 10% of your damages. (A pending 2026 budget proposal would change this to a 51% bar — meaning a plaintiff who is more than 50% at fault would recover nothing — but that hasn't passed.) Insurance carriers routinely try to inflate the injured driver's percentage of fault to reduce payouts. The percentage assignment is decided by the jury at trial (or negotiated during settlement); it isn't fixed by the police accident report and isn't binding even when the report assigns fault. Reporting practice and the actual legal apportionment are separate questions.

How do I get a copy of the police accident report?

If local police responded to the scene, the report is filed under an MV-104A form. In New York State, you can request a copy through the DMV at https://dmv.ny.gov/vehicle-safety/get-copy-accident-report (roughly $7 online, $10 by mail) once the responding agency has uploaded it to the state system, which usually takes 5-10 business days. NCPD and SCPD also have their own direct-request processes through the precinct that responded. If you weren't injured but the property damage exceeded $1,000, New York VTL §605 requires you (the driver) to file your own MV-104 report with the DMV within 10 days regardless of whether police responded.

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