The Federal Aviation Administration (FAA) imposed a ground stop at Denver International Airport on August 15, 2026, due to thunderstorms moving into the Denver metro area. The ground stop was enacted because storms interfered with final approach courses, halting arrivals until 4 p.m. local time, though the FAA initially expected the delay to last until 9:59 p.m.
More than 700 flights experienced delays or cancellations as a result of the severe weather. As of 4:30 p.m., there were 91 cancellations and 708 delays reported at the airport. SkyWest Airlines recorded 38 canceled and 121 delayed flights; United Airlines had 34
cancellations and 265 delays; Southwest Airlines reported 14 cancellations and 211 delayed flights; and Frontier Airlines had 5 canceled and 49 delayed flights. Flights arriving in Denver faced average delays of 114 minutes before the ground stop was lifted, with average delay times remaining near two hours afterward.
Weather conditions and forecast
The National Weather Service issued a severe thunderstorm watch for the Front Range region until 9 p.m. on August 15. The storms brought heavy rainfall with rates potentially reaching 1 to 2 inches within 30 minutes. These conditions raised concerns about localized flash flooding, damaging winds, and large hail in the Denver
metro area and Front Range throughout the weekend.
The threat of continued heavy rain and thunderstorms is forecast to persist, maintaining operational challenges at Denver International Airport and the surrounding region.
Impact on flights and official response
Passengers at Denver International Airport experienced significant disruptions with prolonged wait times due to the mass cancellations and delays. The FAA stated that thunderstorms affecting final approach courses necessitated holding aircraft arrivals and implementing the ground stop.
Though the FAA lifted the ground stop at 4 p.m., residual delays sustained flight disruptions for several hours. Airlines and airport operations continue to manage the effects of the severe weather as
further storms threaten the area through the weekend.
