Airports › Denver (DEN) › May 2026
Airport month · May 2026
Denver International in May 2026
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 2026, reporting carriers scheduled 27,406 domestic departures from Denver International (DEN). 75.9% left less than 15 minutes late and 76.0% reached their destination on time; 0.3% were cancelled.
Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so DEN departures were 1.2 points below the national departure figure.
A year earlier, in May 2025, the airport had 26,894 departures with 68.9% leaving on time: a change of +7.0 points, with flights up 2%.
Flights arriving at DEN that month were on time 79.9% of the time (27,402 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 33% and national aviation system 20%.
- On time 76.0%
- Arrived 15+ minutes late 23.4%
- Cancelled 0.3%
- Diverted 0.3%
May 2026 against a year earlier, the airport's year and the nation
| Measure | May 2026 | May 2025 | DEN, 12 months to Jul 2026 | All reported flights, May 2026 |
|---|---|---|---|---|
| Departed on time | 75.9% | 68.9% | 75.7% | 77.1% |
| Arrived on time | 76.0% | 70.3% | 76.1% | 77.6% |
| Cancelled | 0.3% | 0.7% | 0.7% | 0.9% |
| Average departure delay (late minutes only) | 15.1 min | 23.9 min | 16.5 min | 16.0 min |
| Scheduled departures a day | 914 | 897 | 875 | 20,391 |
| Scheduled departures | 27,406 | 26,894 | 319,208 | 611,735 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| UA United Airlines | 9,440 | 34% | 78.8% | 3.9 min | 0.1% |
| WN Southwest Airlines | 7,397 | 27% | 65.2% | 14.2 min | 0.2% |
| OO SkyWest Airlines | 6,331 | 23% | 81.5% | 3.9 min | 0.4% |
| F9 Frontier Airlines | 1,970 | 7% | 79.6% | 2.5 min | 0.2% |
| DL Delta Air Lines | 1,051 | 4% | 85.1% | -2.6 min | 0.9% |
| AA American Airlines | 799 | 3% | 76.5% | 11.3 min | 1.3% |
| AS Alaska Airlines | 253 | 1% | 86.2% | -2.5 min | 0.0% |
| B6 JetBlue Airways | 98 | 0% | 77.6% | -1.8 min | 1.0% |
| MQ Envoy Air | 36 | 0% | 72.2% | 40.7 min | 0.0% |
| G4 Allegiant Air | 31 | 0% | 71.0% | 19.0 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| DEN–PHX | Denver to Phoenix | 768 | 75.3% | 9.7 min | 0.5% |
| DEN–LAX | Denver to Los Angeles | 687 | 79.5% | 3.6 min | 0.1% |
| DEN–SLC | Denver to Salt Lake City | 665 | 81.1% | 2.3 min | 0.0% |
| DEN–LAS | Denver to Las Vegas | 640 | 76.3% | 7.6 min | 0.6% |
| DEN–ORD | Denver to Chicago | 583 | 75.6% | 4.4 min | 0.0% |
| DEN–SEA | Denver to Seattle | 546 | 76.6% | 4.3 min | 0.0% |
| DEN–DFW | Denver to Dallas/Fort Worth | 533 | 72.0% | 14.6 min | 1.7% |
| DEN–MSP | Denver to Minneapolis | 533 | 77.5% | 4.9 min | 0.2% |
| DEN–SAN | Denver to San Diego | 515 | 77.1% | 3.8 min | 0.2% |
| DEN–SFO | Denver to San Francisco | 483 | 53.4% | 22.5 min | 0.0% |
| DEN–ATL | Denver to Atlanta | 482 | 73.9% | 7.2 min | 0.8% |
| DEN–AUS | Denver to Austin | 467 | 73.4% | 8.6 min | 0.6% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left DEN on time in May 2026?
75.9% of 27,406 scheduled domestic departures left less than 15 minutes late, and 76.0% reached their destination on time. The national figures that month were 77.1% and 77.6%.
How does that compare with a year earlier?
In May 2025, 68.9% of 26,894 departures left on time and 0.7% were cancelled, against 75.9% and 0.3% in May 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.