Airports › Denver (DEN) › May 2025
Airport month · May 2025
Denver International in May 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 May 2025, reporting carriers scheduled 26,894 domestic departures from Denver International (DEN). 68.9% left less than 15 minutes late and 70.3% reached their destination on time; 0.7% were cancelled.
Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so DEN departures were 7.8 points below the national departure figure.
A year earlier, in May 2024, the airport had 26,368 departures with 70.3% leaving on time: a change of −1.4 points, with flights up 2%.
Flights arriving at DEN that month were on time 69.3% of the time (26,898 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 47%, air carrier 27% and national aviation system 18%.
- On time 70.3%
- Arrived 15+ minutes late 28.7%
- Cancelled 0.7%
- Diverted 0.3%
May 2025 against a year earlier, the airport's year and the nation
| Measure | May 2025 | May 2024 | DEN, 12 months to Jul 2026 | All reported flights, May 2025 |
|---|---|---|---|---|
| Departed on time | 68.9% | 70.3% | 75.7% | 76.7% |
| Arrived on time | 70.3% | 71.5% | 76.1% | 75.4% |
| Cancelled | 0.7% | 0.8% | 0.7% | 1.0% |
| Average departure delay (late minutes only) | 23.9 min | 20.8 min | 16.5 min | 17.5 min |
| Scheduled departures a day | 897 | 879 | 875 | 20,188 |
| Scheduled departures | 26,894 | 26,368 | 319,208 | 605,648 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 8,927 | 33% | 71.8% | 14.6 min | 0.4% |
| WN Southwest Airlines | 7,712 | 29% | 64.7% | 20.4 min | 0.5% |
| OO SkyWest Airlines | 6,268 | 23% | 73.5% | 16.7 min | 1.4% |
| F9 Frontier Airlines | 1,785 | 7% | 71.3% | 14.3 min | 1.0% |
| DL Delta Air Lines | 1,024 | 4% | 76.0% | 11.3 min | 0.2% |
| AA American Airlines | 770 | 3% | 77.9% | 10.9 min | 1.7% |
| AS Alaska Airlines | 217 | 1% | 64.5% | 19.7 min | 1.4% |
| B6 JetBlue Airways | 117 | 0% | 64.1% | 16.9 min | 0.0% |
| G4 Allegiant Air | 44 | 0% | 56.8% | 36.5 min | 0.0% |
| MQ Envoy Air | 30 | 0% | 46.7% | 39.0 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| DEN–PHX | Denver to Phoenix | 718 | 68.0% | 15.5 min | 0.7% |
| DEN–LAX | Denver to Los Angeles | 691 | 74.2% | 12.7 min | 0.1% |
| DEN–LAS | Denver to Las Vegas | 665 | 70.8% | 15.3 min | 0.8% |
| DEN–SLC | Denver to Salt Lake City | 645 | 73.2% | 12.0 min | 0.2% |
| DEN–SEA | Denver to Seattle | 563 | 69.6% | 14.7 min | 0.7% |
| DEN–ORD | Denver to Chicago | 552 | 71.9% | 19.4 min | 0.2% |
| DEN–DFW | Denver to Dallas/Fort Worth | 538 | 68.4% | 18.3 min | 1.9% |
| DEN–MSP | Denver to Minneapolis | 504 | 67.1% | 19.8 min | 0.2% |
| DEN–SFO | Denver to San Francisco | 489 | 72.6% | 10.1 min | 0.4% |
| DEN–ATL | Denver to Atlanta | 475 | 71.4% | 16.9 min | 0.4% |
| DEN–SAN | Denver to San Diego | 458 | 73.4% | 9.2 min | 0.7% |
| DEN–COS | Denver to Colorado Springs | 456 | 68.0% | 21.2 min | 0.9% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left DEN on time in May 2025?
68.9% of 26,894 scheduled domestic departures left less than 15 minutes late, and 70.3% reached their destination on time. The national figures that month were 76.7% and 75.4%.
How does that compare with a year earlier?
In May 2024, 70.3% of 26,368 departures left on time and 0.8% were cancelled, against 68.9% and 0.7% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.