More than 1,350 flights were delayed and 181 cancelled across U.S. airports on Tuesday, August 4, 2026, primarily driven by severe weather lingering across the Northeast travel corridor exacerbated by ongoing air traffic control shortages. Transatlantic flights and connections heading to Europe from JFK, Newark and Boston were impacted by the multi-hour domestic backlogs. [1]New York Metro Airports: John F. Kennedy International Airport (JFK) experienced departure delays exceeding two hours, while LaGuardia Airport (LGA) and Newark Liberty International Airport (EWR) faced severe operational constraints from low ceilings, wind, and lightning. [1, 2]Philadelphia International Airport (PHL) faced lingering disruptions following overnight thunderstorm ground stops. In addition to the Northeast weather delays impacting U.S.–Canada routes, regional travel was further strained by the aftermath of a brief WestJet flight attendant strike.