Chicago O'Hare weather ground stop causes 5,581 US delays and 353 cancellations

Disruption overview

Severe weather over Chicago brought departures to a halt at Chicago O'Hare International Airport on 28 April 2026, and the disruption quickly spread through airline networks across the country. By late afternoon, airports and airlines were dealing with 5,581 delays and 353 cancellations, with Chicago O'Hare and Chicago Midway alone accounting for 1,408 delays and 272 cancellations, while Denver, Atlanta, Phoenix, Washington, Boston, Detroit, San Diego, and Seattle also saw knock-on disruption. Because the delays and cancellations were driven by weather outside the airline's control, compensation is unlikely, but airlines should still provide care and assistance such as rebooking or refunds, food and drinks during long waits, and overnight accommodation where needed.

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Disruption details

Severe weather over Chicago forced the Federal Aviation Administration to impose a full ground stop at Chicago O'Hare International Airport on 28 April 2026, pausing departures for all airlines for several hours. By late afternoon, the disruption had grown into 5,581 delays and 353 cancellations across the United States.

For passengers, this meant missed connections, long lines to speak to airline staff, and a real chance that rebooked flights wouldn't leave until the next day. Once O'Hare stalled, aircraft and crew rotations across the country quickly fell out of sync.

Chicago saw the heaviest impact. O'Hare recorded 1,228 delays and 260 cancellations, while nearby Chicago Midway International Airport reported 180 delays and 12 cancellations. Together, the city's two airports accounted for 1,408 delays and 272 cancellations.

The knock-on disruption spread quickly to other major airports:

• Denver International Airport had 383 delays and 3 cancellations, while Hartsfield-Jackson Atlanta International Airport had 292 delays and 3 cancellations.

• Phoenix Sky Harbor International Airport logged 283 delays and 4 cancellations, and Ronald Reagan Washington National Airport recorded 224 delays and 15 cancellations.

• Boston Logan International Airport saw 170 delays and 4 cancellations, Detroit Metropolitan Wayne County Airport had 145 delays and 9 cancellations, and San Diego International Airport reported 147 delays and 4 cancellations.

• Seattle-Tacoma International Airport also recorded 101 delays and 6 cancellations.

Airlines across the network were hit. Southwest Airlines recorded the most delays, with 1,334 delayed flights and 18 cancellations. SkyWest Airlines had the highest number of cancellations at 111. American Airlines reported 698 delays and 24 cancellations, United Airlines 585 delays and 12 cancellations, and Delta Air Lines 389 delays and 6 cancellations.

Regional and partner carriers were also heavily affected. Envoy Air had 48 cancellations, Republic Airways 34, and GoJet Airlines 30. PSA Airlines reported 165 delays and 20 cancellations, Spirit Airlines had 104 delays and 4 cancellations, and Alaska Airlines was among the other carriers affected by the nationwide backlog.

At Chicago O'Hare International Airport, service-desk lines stretched for hours as passengers tried to rebook. Travelers with domestic-to-international connections were especially exposed, with many unlikely to be reaccommodated until the following day.

Airlines said it could take 24–48 hours to reposition aircraft and crews and clear the backlog. With the disruption hitting a major hub early in the day, flight schedules were expected to stay unstable into 29 April 2026 as carriers worked overnight to restore normal rotations.

Because this disruption was caused by severe weather outside the airline's control, compensation is unlikely. Even on EU-bound flights, EC 261 would not normally apply in these circumstances.

That doesn't mean you're without support. If your flight was canceled, your airline should offer rerouting or a refund. During long delays, they should also provide food and refreshments, and if you're stuck away from home overnight, accommodation and transportation to it. If you'd like to understand what may apply to your trip, you can use AirHelp's free flight checker to review your options.

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