Airlines › United Airlines › August 2025
Carrier month · August 2025
United Airlines in August 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 August 2025, United Airlines (UA) reported 68,946 scheduled domestic flights. 75.3% arrived on time, 1.1% were cancelled and 0.4% diverted.
All reporting carriers together recorded 76.3% on time and 1.1% cancelled that month, so the carrier was 1.0 points below the combined figure.
A year earlier, in August 2024, it reported 65,939 flights with 74.9% on time: a change of +0.4 points.
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 38%, air carrier 29% and national aviation system 28%.
- On time 75.3%
- Arrived 15+ minutes late 23.2%
- Cancelled 1.1%
- Diverted 0.4%
August 2025 against a year earlier, the carrier's year and all carriers
| Measure | Aug 2025 | Aug 2024 | UA, 12 months to Jul 2026 | All carriers, Aug 2025 |
|---|---|---|---|---|
| Arrived on time | 75.3% | 74.9% | 78.2% | 76.3% |
| Departed on time | 77.9% | 76.5% | 80.6% | 76.8% |
| Cancelled | 1.1% | 2.0% | 1.0% | 1.1% |
| Average arrival delay | 10.0 min | 10.0 min | 6.3 min | 9.2 min |
| Scheduled flights a day | 2,298 | 2,198 | 2,262 | 20,079 |
| Scheduled flights | 68,946 | 65,939 | 825,693 | 602,378 |
123 airports and 829 routes had UA flights that month.
Busiest airports that month
| Airport | Departures | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|
| DEN Denver | 9,440 | 70.5% | 15.4 min | 0.8% |
| ORD Chicago | 8,616 | 72.3% | 13.1 min | 1.9% |
| IAH Houston | 5,971 | 73.3% | 10.2 min | 0.7% |
| EWR Newark | 5,516 | 76.2% | 8.8 min | 0.9% |
| SFO San Francisco | 5,087 | 80.0% | 5.6 min | 0.9% |
| IAD Washington | 2,988 | 80.8% | 3.2 min | 0.6% |
| LAX Los Angeles | 2,459 | 80.5% | 3.4 min | 1.0% |
| LAS Las Vegas | 1,227 | 77.9% | 4.8 min | 0.8% |
| BOS Boston | 1,154 | 77.1% | 5.3 min | 1.1% |
| MCO Orlando | 1,127 | 71.8% | 20.8 min | 0.8% |
| SEA Seattle | 972 | 73.9% | 13.4 min | 0.7% |
| SAN San Diego | 916 | 77.3% | 6.9 min | 0.8% |
| AUS Austin | 879 | 77.9% | 5.6 min | 1.6% |
| LGA New York | 835 | 74.1% | 8.0 min | 2.4% |
| DFW Dallas/Fort Worth | 810 | 69.4% | 19.8 min | 1.9% |
By scheduled departure hour
Delay causes
Questions and answers
What share of United Airlines flights were on time in August 2025?
75.3% of 68,946 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 76.3% that month.
How does that compare with a year earlier?
In August 2024 the carrier reported 65,939 flights with 74.9% on time and 2.0% cancelled, against 75.3% and 1.1% in August 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2025; public domain. Domestic scheduled flights, totals and averages only. The site's data runs through July 2026. Full record for United Airlines · methodology · corrections.