Strong thunderstorms occurred across the northeastern United States and into Florida. Jet Blue’sThis week’s flight cancellations marked the airline’s worst week of cancellations on record. On Thursday, July 9, approximately one in 20 JetBlue flights were canceled, leaving passengers stranded across the country.
The rough weather caused major damage to major JetBlue hubs, including: 
New York JFK Airport (JFK), 
Boston Logan International Airport (BOS) and operations 
Newark Liberty International Airport (EWR). Due to thunderstorms, the Federal Aviation Administration ( FAA) Flow management stops were also implemented to handle increased traffic entering turbulent airspace.
One in 20 JetBlue flights was cancelled.
As first reported by Simple Flying’s sister site The Travel, aviation analyst Enilria found that JetBlue canceled about 5% of all flights on Thursday, with an additional 38% delayed. More than 1,000 flights were canceled on all major airlines Thursday as the FAA grounding caused widespread disruption.
Heavy rain and thunderstorms pounding New York and New Jersey have led to severe flight disruptions at all of New York’s major airports, with JFK and EWR recording more than 100 cancellations on Thursday. Flash flood warnings were also issued in some of the areas most affected by the weather in and around the Big Apple.
The severe weather led to numerous cancellations and delays, forcing airlines to reschedule hundreds of flights and rebook stranded passengers. The airline has added additional flexibility and rebooking offers to support displaced travelers over the weekend.
Ground Shutdown Advisory for July 9
There is a FAA advisory of mandatory ground stops or ground delays due to thunderstorms affecting Boston (BOS) on Thursday. Baltimore/Washington International Thurgood Marshall Airport (BWI), 
Ronald Reagan Washington National Airport (DCA), 
Denver International Airport (DEN), Newark (EWR), Washington Dulles International Airport (IAD), New York JFK (JFK), 
LaGuardia Airport (LGA) and 
Philadelphia International Airport (PHL).
The displaced aircraft also meant widespread cancellations and delays were noticed across the network, including on the West Coast and South of the country. for 
delta airlinesIts operations have taken a huge hit. 
Hartsfield-Jackson Atlanta International Airport (ATL), the airline recorded more than 500 flight delays. No ground stops were issued in ATL, but the airline experienced significant delays.
The FAA typically issues ground stops to relieve pressure on the country’s systems. This supports the ability to manage airspace capacity and handle departures before takeoff, preventing aircraft congestion, waiting or the need for last-minute diversions. Adverse weather is a common cause of ground stops, usually along with technical failures, emergencies or other extreme congestion.
Other airlines affected include Frontier, Southwest and Allegiant.
Looking at cancellation and delay data Thursday, JetBlue was one of the hardest hit companies, followed by Frontier with 2% of cancellations and 29% of flights delayed. Southwest followed with 1% cancellations and 30% flight delays. Here’s more information on all major airlines, according to TheTravel:
airline | Canceled flights (%) | Flight delays (%) |
|---|---|---|
jet blue | 5% | 38% |
frontier | 2% | 29% |
southwest | 1% | 30% |
delta | 1% | 30% |
united | 1% | 35% |
they claim | 1% | 29% |
American | less than 1% | 28% |
Sky West | less than 1% | 24% |
The number of cancellations began to trickle down, with reports that close to 200 flights had been canceled by Friday, July 10th. USAThis will primarily be centered around the New York metropolitan area while thunderstorm warnings remain in effect. Passengers are reminded to check flight status before heading to the airport and to be patient as airlines work to accommodate replaced aircraft and passengers back on their flights.
Additional ground stops are likely to be issued today to manage congestion at major airports, leaving the region at the mercy of Mother Nature as it deals with severe weather conditions that have wreaked havoc on hundreds of thousands of passengers. Most airlines have added flexibility to their tickets in preparation for the storm. So if you may be able to postpone your trip or if your trip has been affected, please contact your airline or travel agent.
