Flight OddsUA1851 BOS → IAH
United Airlines · Boston, MA to Houston, TX · 31 flights observed, 2025-09-25 to 2025-10-25 · 1,597 mi
UA1851 covers more than one route in the data window — the stats below are for BOS → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
71%
Median delay
-1 min
90th percentile
+66 min
Cancellation rate
0%
How often is UA1851 on time?
Across 31 flights on BOS → IAH from 2025-09-25 to 2025-10-25, UA1851 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +66 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 | 22 | 71% |
| 16-30 min | 4 | 13% |
| 31-60 min | 1 | 3% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 6 | 33% | +68 min |
| 2025-10 | 25 | 80% | +10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 75% |
| Tue | 4 | 50% |
| Wed | 4 | 100% |
| Thu | 5 | 80% |
| Fri | 5 | 60% |
| Sat | 5 | 100% |
| Sun | 4 | 25% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…