Flight Reliability
UA 4329 · United Airlines
BRO → Houston (BRO–IAH)99% of its flights flew this route. The rest (BTR–IAH) are included in these numbers.
89
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 0.6%
- Cancelled
- 14 min early
- Median arrival delay
Based on 344 historical flights. Data through May 2026.
What the data says
Skip Monday if you can.
UA 4329 arrived on time 92% of the time on Tuesdays. On Mondays: 79%.
A bit ahead of the United Airlines network.
UA 4329 arrived on time 86% of the time, versus 79% across the United Airlines network.
Recent months have been rougher.
UA 4329 arrived on time 81% of the time over the last three months in the data, compared with 92% in the three months before that.
The breakdown
- Mon79%(48 flights)
- Tue92%(47 flights)
- Wed88%(48 flights)
- Thu84%(49 flights)
- Fri83%(48 flights)
- Sat89%(52 flights)
- Sun85%(48 flights)
81%
May
Jul 90% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| July 2025 | 90% | 29 |
| August 2025 | 87% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 87% | 31 |
| November 2025 | 76% | 29 |
| December 2025 | 94% | 31 |
| January 2026 | 84% | 31 |
| February 2026 | 100% | 28 |
| March 2026 | 74% | 31 |
| April 2026 | 87% | 30 |
| May 2026 | 81% | 31 |
- Departures on time
- 88%
- Diverted
- 0.6%
- Flights flown
- 340
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 344 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.