A ground stop was imposed and later lifted at Denver International Airport (DIA) on August 15, 2026, due to severe thunderstorms moving into the Denver metro area. The Federal Aviation Administration (FAA) halted arrivals as storms encroached on final approach courses, affecting flights throughout the day until the ground stop ended at 4 p.m. MST.
Flight Delays and Cancellations by Airline
FlightAware reported a total of 91 flight cancellations and 708 delays at DIA as of 4:30 p.m. MST. SkyWest Airlines had 38 canceled and 121 delayed flights. United Airlines experienced 34 cancellations and 265 delays. Southwest Airlines recorded 14 cancellations and 211 delays, while Frontier
Airlines reported 5 canceled and 49 delayed flights.
Departures from the contiguous United States to Denver faced an average delay of 114 minutes during the ground stop period, according to the FAA. Although the ground stop was lifted at 4 p.m. MST, the FAA anticipated ground delays could continue until 9:59 p.m. MST.
Weather Conditions and Impact
The National Weather Service issued a severe thunderstorm watch for the Front Range region until 9 p.m. MST on August 15. CBS Colorado meteorologist Callie Zanandrie forecasted rainfall rates of 1 to 2 inches within 30 minutes across the Denver metro area, raising the risk of localized
flash flooding. Additional hazards included heavy rain, large hail, and damaging winds.
The combination of severe weather and the ground stop led to widespread travel disruptions. Hundreds of flights experienced delays and cancellations, impacting schedules for travelers arriving at or departing from Denver International Airport. The heavy rainfall posed further challenges with a potential for localized flash flooding in Denver’s metropolitan area.
