Flight OddsUA4309 IAH → BRO
United Airlines · Houston, TX to Brownsville, TX · 90 flights observed, 2026-03-29 to 2026-06-30 · 308 mi
UA4309 covers more than one route in the data window — the stats below are for IAH → BRO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-12 min
90th percentile
+25 min
Cancellation rate
0%
How often is UA4309 on time?
Across 90 flights on IAH → BRO from 2026-03-29 to 2026-06-30, UA4309 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +25 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 78 | 88% |
| 16-30 min | 3 | 3% |
| 31-60 min | 2 | 2% |
| 61-120 min | 2 | 2% |
| 2+ hrs | 4 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 3 | 100% | -11 min |
| 2026-04 | 30 | 87% | -4 min |
| 2026-05 | 30 | 90% | +32 min |
| 2026-06 | 26 | 85% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 14 | 86% |
| Tue | 14 | 93% |
| Wed | 13 | 92% |
| Thu | 13 | 85% |
| Fri | 13 | 85% |
| Sat | 9 | 78% |
| 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…