Flight Reliability
UA 4900 · United Airlines
Houston → Knoxville (IAH–TYS)
71
Usually Fine
WanderNerd Reliability Score
- 76%
- Arrive within 15 minutes
- 18 min
- Average arrival delay
- 2.3%
- Cancelled
- 6 min early
- Median arrival delay
Based on 301 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 4900 arrived on time 86% of the time on Tuesdays and just 64% on Sundays. That gap is worth planning around.
A bit behind the IAH–TYS route.
UA 4900 arrived on time 76% of the time, versus 81% across the IAH–TYS route.
A bit behind the United Airlines network.
UA 4900 arrived on time 76% of the time, versus 79% across the United Airlines network.
The breakdown
- Mon70%(43 flights)
- Tue86%(43 flights)
- Wed81%(42 flights)
- Thu79%(43 flights)
- Fri76%(41 flights)
- Sat75%(40 flights)
- Sun64%(42 flights)
85%
Mar
Jun 48% → Mar 85% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 48% | 29 |
| July 2025 | 53% | 30 |
| August 2025 | 68% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 80% | 30 |
| December 2025 | 81% | 31 |
| January 2026 | 79% | 28 |
| February 2026 | 89% | 28 |
| March 2026 | 85% | 26 |
- Departures on time
- 75%
- Diverted
- 0%
- Flights flown
- 294
- Months covered
- 10
Same route, other flights
Keep nerding
Based on 301 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.