Denver International Airport (DEN) August 2025 Operational Report

Flight Activity Overview

Total Departing Flights: 30,482

Year-over-Year Change in Departing Flights: +4.79%

In August 2025, Denver International Airport handled 30,482 departures, a year-over-year change of +4.79%. Schedules were modestly up as carriers added capacity to peak leisure periods and strengthened connectivity across the Mountain West and transcontinental markets.

On-Time Performance and Cancellations

Departure On-Time Performance: +63.47%

Year-over-Year Change in On-Time Performance: -5.38 percentage points

Cancelled Flights: 47

Year-over-Year Change in Cancellations: -81.64%

Punctuality at Denver International Airport was +63.47%, with a change of -5.38 percentage points from last year. Late-day convective weather over the Rockies and air traffic flow measures contributed to delays, while cancellations fell to 47, reducing severe disruption for most passengers.

Airlines Serving Denver International Airport

Denver International Airport is a major hub for United Airlines and an important base for Southwest Airlines and Frontier Airlines, with broad domestic coverage across the United States and selective international links. The network balances high-frequency trunk routes with connections to secondary markets across the West and Midwest.

Outlook

Over the next 4–8 weeks, schedules at the hub should remain broadly steady and departure punctuality is likely to hover near current levels; afternoon thunderstorms and weekend peaks remain the main risk windows. Passengers should favor morning departures, allow 60–90 minutes of buffer for security and connections on busy days, and monitor real-time gate and weather updates via the NextFly App.