Flight Reliability
UA 4923 · United Airlines
MOB → Houston (MOB–IAH)
78
Usually Fine
WanderNerd Reliability Score
- 80%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 2.6%
- Cancelled
- 8 min early
- Median arrival delay
Based on 340 historical flights. Data through May 2026.
What the data says
Skip Thursday if you can.
UA 4923 arrived on time 86% of the time on Tuesdays. On Thursdays: 74%.
A bit behind the MOB–IAH route.
UA 4923 arrived on time 80% of the time, versus 86% across the MOB–IAH route.
Recent months have been rougher.
UA 4923 arrived on time 77% of the time over the last three months in the data, compared with 88% in the three months before that.
The breakdown
- Mon75%(51 flights)
- Tue86%(51 flights)
- Wed83%(48 flights)
- Thu74%(50 flights)
- Fri82%(50 flights)
- Sat77%(39 flights)
- Sun86%(42 flights)
68%
May
Jun 64% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 64% | 28 |
| July 2025 | 75% | 24 |
| August 2025 | 80% | 25 |
| September 2025 | 93% | 27 |
| October 2025 | 81% | 31 |
| November 2025 | 81% | 26 |
| December 2025 | 86% | 28 |
| January 2026 | 85% | 26 |
| February 2026 | 93% | 27 |
| March 2026 | 83% | 29 |
| April 2026 | 79% | 29 |
| May 2026 | 68% | 31 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 331
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 340 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.