Flight OddsSTL → IAD United Airlines
United Airlines · St. Louis, MO to Washington, DC · 717 flights, 2025-07-01 to 2026-06-30 · aggregated across 3 flight numbers
On-time arrival
76%
Median delay
-10 min
90th percentile
+90 min
Cancellation rate
1%
How on-time is United Airlines from STL to IAD?
Across every United Airlines flight number on STL → IAD (717 flights, 2025-07-01 to 2026-06-30), 76% arrived within 15 minutes of schedule. Median arrival delay -10 min; the worst 10% ran +90 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 541 | 76% |
| 16-30 min | 37 | 5% |
| 31-60 min | 47 | 7% |
| 61-120 min | 30 | 4% |
| 2+ hrs | 57 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 61 | 74% | +13 min |
| 2025-08 | 62 | 76% | +10 min |
| 2025-09 | 58 | 86% | +9 min |
| 2025-10 | 51 | 73% | +17 min |
| 2025-11 | 59 | 73% | +25 min |
| 2025-12 | 62 | 66% | +73 min |
| 2026-01 | 59 | 68% | +48 min |
| 2026-02 | 56 | 77% | +10 min |
| 2026-03 | 62 | 73% | +12 min |
| 2026-04 | 60 | 78% | +8 min |
| 2026-05 | 62 | 76% | +9 min |
| 2026-06 | 60 | 93% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 104 | 75% |
| Tue | 102 | 77% |
| Wed | 99 | 80% |
| Thu | 104 | 77% |
| Fri | 104 | 73% |
| Sat | 98 | 71% |
| Sun | 101 | 78% |
UA flight numbers on STL → IAD
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…