Flight OddsUA4506 STL → IAD
United Airlines · St. Louis, MO to Washington, DC · 352 flights observed, 2025-07-01 to 2026-06-30 · 696 mi
UA4506 covers more than one route in the data window — the stats below are for STL → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
82%
Median delay
-13 min
90th percentile
+43 min
Cancellation rate
0%
How often is UA4506 on time?
Across 352 flights on STL → IAD from 2025-07-01 to 2026-06-30, UA4506 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +43 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 | 287 | 82% |
| 16-30 min | 16 | 5% |
| 31-60 min | 21 | 6% |
| 61-120 min | 13 | 4% |
| 2+ hrs | 14 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 81% | +5 min |
| 2025-08 | 31 | 87% | -8 min |
| 2025-09 | 28 | 89% | -9 min |
| 2025-10 | 20 | 75% | +6 min |
| 2025-11 | 30 | 90% | +3 min |
| 2025-12 | 31 | 74% | +15 min |
| 2026-01 | 30 | 73% | +21 min |
| 2026-02 | 28 | 75% | +15 min |
| 2026-03 | 31 | 81% | -3 min |
| 2026-04 | 30 | 80% | -1 min |
| 2026-05 | 31 | 81% | +2 min |
| 2026-06 | 30 | 93% | -9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 52 | 79% |
| Tue | 49 | 84% |
| Wed | 48 | 92% |
| Thu | 52 | 79% |
| Fri | 52 | 79% |
| Sat | 47 | 72% |
| Sun | 51 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…