Flight OddsUA503 ORD → DEN
United Airlines · Chicago, IL to Denver, CO · 86 flights observed, 2025-07-01 to 2025-09-24 · 888 mi
UA503 covers more than one route in the data window — the stats below are for ORD → DEN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
68%
Median delay
-2 min
90th percentile
+88 min
Cancellation rate
3%
How often is UA503 on time?
Across 86 flights on ORD → DEN from 2025-07-01 to 2025-09-24, UA503 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +88 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 56 | 68% |
| 16-30 min | 9 | 11% |
| 31-60 min | 3 | 4% |
| 61-120 min | 9 | 11% |
| 2+ hrs | 5 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 50% | +69 min |
| 2025-08 | 29 | 72% | +2 min |
| 2025-09 | 23 | 87% | -1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 67% |
| Tue | 13 | 69% |
| Wed | 12 | 75% |
| Thu | 11 | 73% |
| Fri | 11 | 64% |
| Sat | 12 | 58% |
| Sun | 11 | 73% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…