Flight Reliability
UA 4289 · United Airlines
JAN → Houston (JAN–IAH)86% of its flights flew this route. The rest (IAH–LFT, IAD–BTV) are included in these numbers.
77
Usually Fine
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 14 min
- Average arrival delay
- 1.7%
- Cancelled
- 14 min early
- Median arrival delay
Based on 354 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
UA 4289 departing between 9 PM–12 AM arrived on time 87% of the time, versus 74% between 3–6 PM.
Friday is doing you no favors.
UA 4289 arrived on time 87% of the time on Tuesdays. On Fridays: 73%.
The breakdown
- Mon80%(51 flights)
- Tue87%(45 flights)
- Wed80%(50 flights)
- Thu82%(50 flights)
- Fri73%(51 flights)
- Sat83%(47 flights)
- Sun81%(52 flights)
- 12–3 PM81%(296 flights)
- 3–6 PM74%(27 flights)
- 9 PM–12 AM87%(23 flights)
77%
May
Jun 68% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 68% | 28 |
| July 2025 | 68% | 31 |
| August 2025 | 68% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 89% | 27 |
| December 2025 | 65% | 31 |
| January 2026 | 87% | 30 |
| February 2026 | 100% | 28 |
| March 2026 | 89% | 28 |
| April 2026 | 86% | 21 |
| May 2026 | 77% | 30 |
- Departures on time
- 81%
- Diverted
- 0.6%
- Flights flown
- 346
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 354 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.