Flight Reliability
UA 4911 · United Airlines
Houston → SGF (IAH–SGF)91% of its flights flew this route. The rest (GPT–IAH) are included in these numbers.
79
Usually Fine
WanderNerd Reliability Score
- 82%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 2.7%
- Cancelled
- 10 min early
- Median arrival delay
Based on 188 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 4911 arrived on time 91% of the time on Mondays and just 64% on Sundays. That gap is worth planning around.
A bit ahead of the United Airlines network.
UA 4911 arrived on time 82% of the time, versus 79% across the United Airlines network.
Slipping a little lately.
UA 4911 arrived on time 81% of the time over the last three months in the data, compared with 85% in the three months before that.
The breakdown
- Mon91%(34 flights)
- Tue91%(11 flights)
- Wed84%(19 flights)
- Thu91%(33 flights)
- Fri78%(36 flights)
- Sat77%(22 flights)
- Sun64%(28 flights)
- 9 AM–12 PM81%(16 flights)
- 12–3 PM82%(163 flights)
- 3–6 PM—(4 flights)
80%
May
Jun 77% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 17 |
| July 2025 | 75% | 12 |
| November 2025 | 74% | 19 |
| January 2026 | 84% | 25 |
| February 2026 | 96% | 26 |
| March 2026 | 85% | 20 |
| April 2026 | 77% | 26 |
| May 2026 | 80% | 25 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 183
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 188 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.