Flight OddsUA4556 STL → ORD
United Airlines · St. Louis, MO to Chicago, IL · 5 flights observed, 2026-01-10 to 2026-02-07 · 258 mi
UA4556 covers more than one route in the data window — the stats below are for STL → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
100%
Median delay
-13 min
90th percentile
-11 min
Cancellation rate
20%
How often is UA4556 on time?
Across 5 flights on STL → ORD from 2026-01-10 to 2026-02-07, UA4556 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived -11 min or later. 20% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 4 | 100% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 3 | 100% | -20 min |
| 2026-02 | 1 | 100% | -14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 4 | 100% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…