Flight Reliability
UA 4890 · United Airlines
Houston → Knoxville (IAH–TYS)
81
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 1.0%
- Cancelled
- 7 min early
- Median arrival delay
Based on 312 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
UA 4890 arrived on time 91% of the time on Saturdays and just 66% on Fridays. That gap is worth planning around.
Ticking up lately.
UA 4890 arrived on time 85% of the time over the last three months in the data, compared with 81% in the three months before that.
The breakdown
- Mon75%(47 flights)
- Tue85%(46 flights)
- Wed83%(47 flights)
- Thu83%(47 flights)
- Fri66%(47 flights)
- Sat91%(34 flights)
- Sun85%(39 flights)
- 12–3 PM80%(306 flights)
- 3–6 PM—(1 flights)
79%
Apr
Jun 63% → Apr 79% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 27 |
| July 2025 | 70% | 23 |
| August 2025 | 75% | 24 |
| September 2025 | 93% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 80% | 30 |
| December 2025 | 74% | 31 |
| January 2026 | 89% | 26 |
| February 2026 | 100% | 25 |
| March 2026 | 74% | 31 |
| April 2026 | 79% | 29 |
- Departures on time
- 77%
- Diverted
- 0.6%
- Flights flown
- 307
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 312 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.