United Airlines on-time performance
1,065 routes · 134 airports · Aug 2025 – Jul 2026
On-time arrivals
79%
arrived < 15 min late
Cancelled
1.0%
8,510 flights
Avg arrival delay
16 min
71 min when late
US airline rank
#5 of 14
by on-time arrival
Key facts
- United Airlines flights arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1% were cancelled, and 7% arrived an hour or more late.
- That ranks #5 of 14 US airlines for on-time arrivals.
- The largest source of delay minutes was late-arriving aircraft (36%).
Monthly trend
United Airlines's most delayed routes
United Airlines's most reliable routes
United Airlines at its biggest airports
Departures operated by this airline at each airport.
| Airport | On time | Cancelled | Avg delay | Departures |
|---|---|---|---|---|
| DEN Denver | 79% | 0.4% | 14 min | 107,510 |
| ORD Chicago | 74% | 1.4% | 20 min | 100,681 |
| IAH Houston | 80% | 0.6% | 13 min | 74,382 |
| EWR Newark | 77% | 2.1% | 18 min | 68,102 |
| SFO San Francisco | 81% | 0.5% | 12 min | 61,465 |
| IAD Washington | 83% | 0.9% | 14 min | 36,755 |
| LAX Los Angeles | 83% | 0.5% | 12 min | 29,389 |
| LAS Las Vegas | 80% | 0.6% | 14 min | 15,135 |
| MCO Orlando | 81% | 1.1% | 16 min | 15,073 |
| BOS Boston | 79% | 1.9% | 17 min | 12,960 |
| AUS Austin | 80% | 1.2% | 16 min | 10,876 |
| SAN San Diego | 81% | 0.7% | 14 min | 10,567 |
| PHX Phoenix | 81% | 0.8% | 16 min | 10,082 |
| DFW Dallas/Fort Worth | 76% | 1.7% | 22 min | 9,986 |
| LGA New York | 73% | 3.0% | 24 min | 9,066 |
Why flights were late
- Late-arriving aircraft36%
- Air traffic control & airport congestion34%
- Airline (crew, maintenance, cleaning, fueling)26%
- Extreme weather4%
- Security0%
Why flights were cancelled
- Extreme weather68%
- Airline (crew, maintenance, cleaning, fueling)21%
- Air traffic control & airport congestion11%
- Security0%
Busiest United Airlines routes
- LGA → ORD 67%
- ORD → LGA 67%
- ORD → EWR 72%
- EWR → ORD 71%
- IAH → ORD 79%
- ORD → IAH 80%
- EWR → MCO 80%
- MCO → EWR 79%
- DEN → IAH 79%
- IAH → DEN 82%
- SFO → ORD 78%
- ORD → SFO 70%
- EWR → SFO 68%
- SFO → EWR 75%
- ORD → DEN 79%
- DEN → ORD 72%
- SFO → IAH 84%
- IAH → SFO 78%
- EWR → LAX 73%
- LAX → EWR 78%
- IAH → EWR 75%
- EWR → IAH 81%
- IAH → LAX 85%
- LAX → IAH 87%
- DEN → SFO 70%
- SFO → DEN 83%
- ORD → DCA 71%
- DCA → ORD 75%
- LAX → ORD 80%
- ORD → LAX 77%
- EWR → DEN 79%
- DEN → EWR 78%
- SFO → LAX 78%
- LAX → SFO 64%
- LAX → DEN 88%
- DEN → LAX 84%
- SFO → LAS 79%
- LAS → SFO 65%
- IAD → DEN 84%
- DEN → IAD 85%
- MSY → IAH 83%
- IAH → MSY 83%
- PBI → EWR 77%
- EWR → PBI 79%
- ORD → BOS 69%
- BOS → ORD 76%
- EWR → FLL 78%
- FLL → EWR 78%
- SFO → IAD 84%
- IAD → SFO 79%
- BOS → EWR 76%
- EWR → BOS 71%
- IAH → AUS 80%
- AUS → IAH 76%
- SFO → SAN 75%
- SAN → SFO 69%
- IAH → LAS 84%
- LAS → IAH 86%
- ORD → MCO 79%
- MCO → ORD 76%
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.