Airlines › United Airlines › May 2025
Carrier month · May 2025
United Airlines 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, United Airlines (UA) reported 67,807 scheduled domestic flights. 74.7% arrived on time, 0.9% were cancelled and 0.3% diverted.
All reporting carriers together recorded 75.4% on time and 1.0% cancelled that month, so the carrier was 0.7 points below the combined figure.
A year earlier, in May 2024, it reported 64,156 flights with 72.4% on time: a change of +2.3 points.
Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 39%, late-arriving aircraft 32% and air carrier 23%.
- On time 74.7%
- Arrived 15+ minutes late 24.2%
- Cancelled 0.9%
- Diverted 0.3%
May 2025 against a year earlier, the carrier's year and all carriers
| Measure | May 2025 | May 2024 | UA, 12 months to Jul 2026 | All carriers, May 2025 |
|---|---|---|---|---|
| Arrived on time | 74.7% | 72.4% | 78.2% | 75.4% |
| Departed on time | 77.7% | 74.2% | 80.6% | 76.7% |
| Cancelled | 0.9% | 1.2% | 1.0% | 1.0% |
| Average arrival delay | 11.1 min | 13.6 min | 6.3 min | 10.2 min |
| Scheduled flights a day | 2,260 | 2,139 | 2,262 | 20,188 |
| Scheduled flights | 67,807 | 64,156 | 825,693 | 605,648 |
121 airports and 847 routes had UA flights that month.
Busiest airports that month
| Airport | Departures | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|
| DEN Denver | 8,927 | 71.8% | 14.6 min | 0.4% |
| ORD Chicago | 8,263 | 78.4% | 4.8 min | 0.3% |
| IAH Houston | 6,292 | 73.4% | 11.7 min | 1.0% |
| SFO San Francisco | 5,000 | 80.6% | 3.2 min | 0.5% |
| EWR Newark | 4,991 | 66.4% | 15.5 min | 2.9% |
| IAD Washington | 3,310 | 72.1% | 12.2 min | 0.3% |
| LAX Los Angeles | 2,474 | 82.2% | 5.0 min | 0.5% |
| LAS Las Vegas | 1,277 | 75.9% | 10.3 min | 0.7% |
| MCO Orlando | 1,215 | 69.0% | 20.7 min | 1.0% |
| BOS Boston | 1,121 | 75.5% | 6.8 min | 1.1% |
| AUS Austin | 913 | 71.3% | 20.2 min | 1.4% |
| PHX Phoenix | 904 | 76.3% | 10.9 min | 0.9% |
| SAN San Diego | 904 | 77.2% | 8.5 min | 1.0% |
| CLE Cleveland | 821 | 81.6% | 6.1 min | 0.6% |
| LGA New York | 817 | 74.7% | 9.5 min | 0.6% |
By scheduled departure hour
Delay causes
Questions and answers
What share of United Airlines flights were on time in May 2025?
74.7% of 67,807 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 75.4% that month.
How does that compare with a year earlier?
In May 2024 the carrier reported 64,156 flights with 72.4% on time and 1.2% cancelled, against 74.7% and 0.9% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.