Flight Reliability
UA 4859 · United Airlines
LBB → Houston (LBB–IAH)
81
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 2.0%
- Cancelled
- 12 min early
- Median arrival delay
Based on 346 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
UA 4859 departing between 12–3 PM arrived on time 92% of the time, versus 77% between 3–6 PM.
Skip Tuesday if you can.
UA 4859 arrived on time 88% of the time on Wednesdays. On Tuesdays: 75%.
Ticking up lately.
UA 4859 arrived on time 91% of the time over the last three months in the data, compared with 86% in the three months before that.
The breakdown
- Mon84%(43 flights)
- Tue75%(52 flights)
- Wed88%(51 flights)
- Thu78%(50 flights)
- Fri80%(50 flights)
- Sat77%(44 flights)
- Sun82%(49 flights)
- 12–3 PM92%(85 flights)
- 3–6 PM77%(254 flights)
93%
May
Jun 48% → May 93% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 48% | 27 |
| July 2025 | 67% | 27 |
| August 2025 | 68% | 28 |
| September 2025 | 93% | 30 |
| October 2025 | 81% | 31 |
| November 2025 | 76% | 29 |
| December 2025 | 87% | 30 |
| January 2026 | 83% | 24 |
| February 2026 | 88% | 24 |
| March 2026 | 83% | 30 |
| April 2026 | 97% | 29 |
| May 2026 | 93% | 30 |
- Departures on time
- 85%
- Diverted
- 0%
- Flights flown
- 339
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 346 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.