Flight OddsUA4031 IAH → TUS
United Airlines · Houston, TX to Tucson, AZ · 68 flights observed, 2026-03-05 to 2026-05-20 · 937 mi
UA4031 covers more than one route in the data window — the stats below are for IAH → TUS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
87%
Median delay
-23 min
90th percentile
+44 min
Cancellation rate
1%
How often is UA4031 on time?
Across 68 flights on IAH → TUS from 2026-03-05 to 2026-05-20, UA4031 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -23 min, and the worst 10% of flights arrived +44 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 | 58 | 87% |
| 16-30 min | 1 | 1% |
| 31-60 min | 5 | 7% |
| 61-120 min | 3 | 4% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 26 | 85% | -16 min |
| 2026-04 | 21 | 86% | -6 min |
| 2026-05 | 20 | 90% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 11 | 91% |
| Tue | 11 | 91% |
| Wed | 6 | 83% |
| Thu | 11 | 82% |
| Fri | 11 | 82% |
| Sat | 7 | 71% |
| Sun | 10 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…