Airports › Denver (DEN) › July 2025
Airport month · July 2025
Denver International in July 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In July 2025, reporting carriers scheduled 29,433 domestic departures from Denver International (DEN). 63.3% left less than 15 minutes late and 61.7% reached their destination on time; 1.5% were cancelled.
Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so DEN departures were 6.4 points below the national departure figure.
A year earlier, in July 2024, the airport had 28,401 departures with 69.9% leaving on time: a change of −6.6 points, with flights up 4%.
Flights arriving at DEN that month were on time 65.9% of the time (29,433 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 51%, air carrier 28% and national aviation system 17%.
- On time 61.7%
- Arrived 15+ minutes late 36.3%
- Cancelled 1.5%
- Diverted 0.6%
July 2025 against a year earlier, the airport's year and the nation
| Measure | Jul 2025 | Jul 2024 | DEN, 12 months to Jul 2026 | All reported flights, Jul 2025 |
|---|---|---|---|---|
| Departed on time | 63.3% | 69.9% | 75.7% | 69.7% |
| Arrived on time | 61.7% | 70.9% | 76.1% | 69.0% |
| Cancelled | 1.5% | 1.6% | 0.7% | 2.5% |
| Average departure delay (late minutes only) | 29.7 min | 20.9 min | 16.5 min | 24.3 min |
| Scheduled departures a day | 981 | 947 | 875 | 21,048 |
| Scheduled departures | 29,433 | 28,401 | 319,208 | 631,428 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 9,646 | 33% | 61.4% | 26.1 min | 1.0% |
| WN Southwest Airlines | 8,693 | 30% | 56.2% | 28.1 min | 1.3% |
| OO SkyWest Airlines | 6,702 | 23% | 67.0% | 21.3 min | 1.8% |
| F9 Frontier Airlines | 1,956 | 7% | 65.4% | 20.3 min | 1.5% |
| DL Delta Air Lines | 1,119 | 4% | 70.2% | 17.4 min | 2.3% |
| AA American Airlines | 802 | 3% | 63.1% | 30.8 min | 3.4% |
| AS Alaska Airlines | 268 | 1% | 54.9% | 26.6 min | 2.2% |
| B6 JetBlue Airways | 149 | 1% | 51.7% | 24.3 min | 6.0% |
| G4 Allegiant Air | 84 | 0% | 52.4% | 65.5 min | 4.8% |
| MQ Envoy Air | 14 | 0% | 42.9% | 46.7 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| DEN–SLC | Denver to Salt Lake City | 687 | 58.2% | 26.8 min | 1.5% |
| DEN–LAX | Denver to Los Angeles | 679 | 69.4% | 16.5 min | 1.2% |
| DEN–SEA | Denver to Seattle | 670 | 62.4% | 21.0 min | 1.6% |
| DEN–PHX | Denver to Phoenix | 658 | 60.2% | 25.3 min | 1.5% |
| DEN–ORD | Denver to Chicago | 583 | 54.7% | 40.0 min | 2.7% |
| DEN–MSP | Denver to Minneapolis | 570 | 63.5% | 25.1 min | 1.2% |
| DEN–LAS | Denver to Las Vegas | 561 | 61.9% | 25.2 min | 1.1% |
| DEN–DFW | Denver to Dallas/Fort Worth | 540 | 60.9% | 32.2 min | 2.0% |
| DEN–ATL | Denver to Atlanta | 525 | 69.1% | 19.1 min | 0.8% |
| DEN–COS | Denver to Colorado Springs | 466 | 56.0% | 30.3 min | 3.6% |
| DEN–SFO | Denver to San Francisco | 464 | 54.5% | 27.2 min | 2.4% |
| DEN–PDX | Denver to Portland | 461 | 62.3% | 21.4 min | 2.2% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left DEN on time in July 2025?
63.3% of 29,433 scheduled domestic departures left less than 15 minutes late, and 61.7% reached their destination on time. The national figures that month were 69.7% and 69.0%.
How does that compare with a year earlier?
In July 2024, 69.9% of 28,401 departures left on time and 1.6% were cancelled, against 63.3% and 1.5% in July 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for July 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for DEN · methodology · corrections.