Flight OddsUA4231 SGF → IAH
United Airlines · Springfield, MO to Houston, TX · 107 flights observed, 2025-07-01 to 2026-01-05 · 513 mi
UA4231 covers more than one route in the data window — the stats below are for SGF → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
80%
Median delay
-10 min
90th percentile
+56 min
Cancellation rate
1%
How often is UA4231 on time?
Across 107 flights on SGF → IAH from 2025-07-01 to 2026-01-05, UA4231 arrived within 15 minutes of schedule 80% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +56 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 84 | 80% |
| 16-30 min | 2 | 2% |
| 31-60 min | 9 | 9% |
| 61-120 min | 6 | 6% |
| 2+ hrs | 4 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 20 | 75% | +3 min |
| 2025-08 | 12 | 92% | -12 min |
| 2025-09 | 6 | 67% | +17 min |
| 2025-10 | 29 | 83% | +13 min |
| 2025-11 | 19 | 68% | +15 min |
| 2025-12 | 14 | 86% | +54 min |
| 2026-01 | 5 | 100% | -17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 19 | 68% |
| Tue | 14 | 86% |
| Wed | 12 | 92% |
| Thu | 19 | 84% |
| Fri | 18 | 72% |
| Sat | 10 | 70% |
| Sun | 13 | 92% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…