U.S. flights record 4,395 delays

U.S. flight disruptions piled up on Saturday, May 23, as thunderstorms and air traffic constraints rippled through the national aviation system during the Memorial Day travel rush. A national disruption tally cited 4,395 delayed flights and 127 cancellations across the United States on Saturday. The Federal Aviation Administration separately said arriving flights at Philadelphia International Airport were running an average of 25 minutes late because of weather. AAA had projected before the holiday that 3.66 million people would fly domestically between May 21 and May 25, adding pressure to an already crowded system. ### Where did the delays show up first? Philadelphia International Airport was one of the clearest examples on Saturday. NBC10 Philadelphia, citing the FAA’s Air Traffic Control System Command Center, reported that arriving flights at PHL were delayed an average of 25 minutes because of weather and low clouds, with a traffic management program still in effect as of 2:20 p.m. on May 23. (nbcphiladelphia.com) The FAA’s National Airspace System dashboard showed fresh strain again on Sunday morning, listing an active ground delay at Chicago O’Hare with average delays of 44 minutes due to thunderstorms. The same FAA dashboard also showed forecast ground stop or delay-program risks later Sunday for hubs including San Francisco, Washington-area airports, New York Kennedy, Newark, Boston, Philadelphia, Tampa, Orlando, Charlotte, Denver and Atlanta. ### Why did weather cause a national problem instead of a local one? (nbcphiladelphia.com) Thunderstorms affect more than one airport because aircraft, crews and gates rotate through tightly scheduled networks. When an FAA traffic management program slows arrivals at one large airport, airlines can wind up holding aircraft at departure points, reassigning crews or delaying later segments on the same plane. That pattern was visible in the FAA dashboard’s mix of current airport events and forecast route-management measures across several regions on May 24. (nasstatus.faa.gov) The FAA’s live status page is built for exactly that kind of traffic management. Its listings include ground delays, ground stops, reroutes and forecast events, and the agency’s operations data page says daily delay information is available through the Operations Network, or OPSNET. ### How busy was the system supposed to be this weekend? AAA said on May 11 that 45 million Americans were expected to travel at least 50 miles from home over the Memorial Day period from Thursday, May 21, through Monday, May 25. (nasstatus.faa.gov) Of those, 3.66 million were expected to fly domestically, a small increase from last year, while airfares booked in advance were 6% cheaper year over year, with an average round-trip domestic ticket costing $800. (aspm.faa.gov) Stacey Barber, vice president of AAA Travel, said in the forecast release that “travel demand remains strong” despite higher fuel prices. That demand meant even moderate weather disruptions had less slack in the system to absorb them. ### Which airlines were most exposed? American Airlines, Delta Air Lines, United Airlines and Southwest Airlines were among the carriers most exposed to knock-on delays because they operate large domestic networks through major hubs affected by spring and early-summer thunderstorms. (newsroom.aaa.com) The available FAA and local reporting cited system conditions and airport programs rather than assigning carrier-specific blame. Chicago O’Hare, Philadelphia and the New York-area airports matter because they connect large volumes of domestic traffic. A delay at one of those airports can affect passengers who are not flying to or from the storm zone if their aircraft or crew is scheduled to pass through it later in the day. That is an inference from the FAA’s network-wide traffic management approach and airlines’ hub structures. ### What should travelers watch next? Sunday, May 24, is the next checkpoint for travelers because the FAA dashboard was already showing active delays at O’Hare and possible ground-stop or delay-program conditions later in the day at multiple East Coast and Florida airports. (nbcphiladelphia.com) Travelers can check destination-specific delays through the FAA’s National Airspace System status page and should also confirm flight status directly with their airline before heading to the airport. (nasstatus.faa.gov)