Flight Reliability
UA 4343 · United Airlines
Houston → SGF (IAH–SGF)90% of its flights flew this route. The rest (ELP–IAH, IAH–ECP) are included in these numbers.
86
Pretty Reliable
WanderNerd Reliability Score
- 80%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.7%
- Cancelled
- 8 min early
- Median arrival delay
Based on 293 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
UA 4343 departing between 6–9 PM arrived on time 81% of the time, versus 62% between 12–3 PM.
Sunday scaries are real for this one.
UA 4343 arrived on time 90% of the time on Thursdays and just 69% on Sundays. That gap is worth planning around.
Ticking up lately.
UA 4343 arrived on time 84% of the time over the last three months in the data, compared with 80% in the three months before that.
The breakdown
- Mon82%(39 flights)
- Tue81%(32 flights)
- Wed85%(40 flights)
- Thu90%(40 flights)
- Fri81%(41 flights)
- Sat79%(47 flights)
- Sun69%(52 flights)
- 9 AM–12 PM—(6 flights)
- 12–3 PM62%(13 flights)
- 6–9 PM81%(271 flights)
- 9 PM–12 AM—(1 flights)
90%
May
Aug 84% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| August 2025 | 84% | 19 |
| September 2025 | 90% | 30 |
| October 2025 | 71% | 31 |
| November 2025 | 76% | 29 |
| December 2025 | 73% | 30 |
| January 2026 | 89% | 26 |
| February 2026 | 79% | 24 |
| March 2026 | 83% | 30 |
| April 2026 | 80% | 30 |
| May 2026 | 90% | 29 |
- Departures on time
- 81%
- Diverted
- 0%
- Flights flown
- 291
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 293 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.