Flight Reliability
UA 4243 · United Airlines
GPT → Houston (GPT–IAH)95% of its flights flew this route. The rest (IAH–LBB, IAH–ELP) are included in these numbers.
82
Pretty Reliable
WanderNerd Reliability Score
- 82%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 2.1%
- Cancelled
- 15 min early
- Median arrival delay
Based on 337 historical flights. Data through May 2026.
What the data says
Wednesday is the weak spot.
UA 4243 arrived on time 86% of the time on Thursdays. On Wednesdays: 78%.
A bit ahead of the United Airlines network.
UA 4243 arrived on time 82% of the time, versus 79% across the United Airlines network.
Slipping a little lately.
UA 4243 arrived on time 79% of the time over the last three months in the data, compared with 86% in the three months before that.
The breakdown
- Mon78%(51 flights)
- Tue84%(38 flights)
- Wed78%(45 flights)
- Thu86%(50 flights)
- Fri82%(51 flights)
- Sat84%(44 flights)
- Sun82%(51 flights)
- 9 AM–12 PM82%(11 flights)
- 12–3 PM82%(314 flights)
- 3–6 PM—(4 flights)
- 6–9 PM—(1 flights)
71%
May
Jun 57% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 57% | 28 |
| July 2025 | 74% | 31 |
| August 2025 | 83% | 29 |
| September 2025 | 97% | 30 |
| October 2025 | 90% | 30 |
| November 2025 | 92% | 26 |
| December 2025 | 88% | 25 |
| January 2026 | 82% | 28 |
| February 2026 | 88% | 24 |
| March 2026 | 89% | 26 |
| April 2026 | 77% | 22 |
| May 2026 | 71% | 31 |
- Departures on time
- 81%
- Diverted
- 0%
- Flights flown
- 330
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 337 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.