JFK, Boston, SFO, and Miami lead US disruptions with 638 delays and 55 cancellations

Disruption overview

Summer storms, runway work, and staffing pressure pushed delay levels far above normal at major US airports on 28 June 2026. John F. Kennedy International Airport, Boston Logan International Airport, San Francisco International Airport, and Miami International Airport recorded at least 638 delays and 55 cancellations between them, while nationwide disruption reached around 4,000 affected flights. Carriers largely chose to absorb delays rather than cancel large numbers of services, which kept networks moving but increased the risk of missed onward connections. Because bad weather was the main driver, compensation is unlikely in most cases, but airlines should still help with rebooking, refunds, and care during long waits.

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Disruption details

On 28 June 2026, passengers traveling through John F. Kennedy International Airport, Boston Logan International Airport, San Francisco International Airport, and Miami International Airport faced heavy disruption as summer storms, runway work, and staffing pressure hit major US hubs. Around 4,000 flights were affected nationwide, including more than 3,900 delays and over 100 cancellations.

For passengers, this meant longer waits at the gate, aircraft held on the ground, and a greater risk of missed onward connections. The 4 hardest-hit airports alone accounted for at least 638 delays and 55 cancellations, showing how quickly problems at a few key hubs can spread across the wider network.

The pressure showed up differently at each airport:

• At John F. Kennedy International Airport, thunderstorms and low cloud cut arrival rates and triggered ground delay programs.

• At Boston Logan International Airport, similar weather restrictions slowed traffic, while the airport was still under pressure after severe thunderstorms earlier in the month exposed capacity limits in New England airspace.

• At San Francisco International Airport, reduced visibility forced more conservative use of the airport’s closely spaced parallel runways.

• At Miami International Airport, heavy seasonal storm systems combined with intense holiday demand to keep operations under strain.

Across the country, delays far outnumbered outright cancellations, with an approximate 11-to-1 ratio. Rather than cut large blocks of flights, airlines mostly chose to stretch turnaround times and taxi times to keep their networks moving. That helped avoid mass cancellations, but it also left travelers facing longer journeys and less certainty about when they would actually depart.

Airlines including JetBlue, Delta Air Lines, American Airlines, Qatar Airways, and Cathay Pacific all felt the knock-on effect. Ongoing air traffic control staffing shortages and tight crew duty-time limits left little room to recover once conditions worsened, so even flights that did operate were more likely to slip further behind schedule as the day went on.

The disruption also spread well beyond domestic flying. Long-haul routes linking the United States with the United Kingdom, France, China, Switzerland, Qatar, Australia, and Argentina saw secondary delays as departure slots narrowed and arrival times drifted later.

By the end of the day, the system had avoided mass groundings. Even so, the pattern is a warning for the busiest part of the summer travel season. Federal slot controls, construction projects, and chronic staffing gaps mean similar waves of disruption are likely if more storms hit on peak travel days.

Airlines had already been issuing flexible rebooking advice earlier in June to help customers avoid the most congested periods. If your journey was affected on 28 June, it’s worth keeping receipts, checking your rebooking or refund options, and paying close attention to any support your airline offers while you wait.

Because bad weather was the main cause here, compensation is unlikely in most cases. Even so, that doesn’t mean you’re without support. Your airline should still help with rebooking or refunds, and may need to provide food, refreshments, accommodation, or communication support during a long delay or cancellation. If you want to understand your options or check whether your route qualifies under EC 261 or other rules, AirHelp’s free flight checker is a simple place to start.

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