Flight OddsUA4599 ORD → BHM
United Airlines · Chicago, IL to Birmingham, AL · 296 flights observed, 2025-07-01 to 2026-05-20 · 584 mi
UA4599 covers more than one route in the data window — the stats below are for ORD → BHM, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
58%
Median delay
+6 min
90th percentile
+111 min
Cancellation rate
5%
How often is UA4599 on time?
Across 296 flights on ORD → BHM from 2025-07-01 to 2026-05-20, UA4599 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +111 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 162 | 58% |
| 16-30 min | 31 | 11% |
| 31-60 min | 25 | 9% |
| 61-120 min | 36 | 13% |
| 2+ hrs | 26 | 9% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 31% | +80 min |
| 2025-08 | 30 | 60% | +13 min |
| 2025-09 | 30 | 70% | +31 min |
| 2025-10 | 30 | 80% | +6 min |
| 2025-11 | 26 | 62% | +14 min |
| 2025-12 | 30 | 40% | +72 min |
| 2026-01 | 20 | 55% | +28 min |
| 2026-02 | 14 | 43% | +20 min |
| 2026-03 | 25 | 60% | +43 min |
| 2026-04 | 26 | 73% | +29 min |
| 2026-05 | 20 | 55% | +41 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 39 | 51% |
| Tue | 42 | 64% |
| Wed | 43 | 58% |
| Thu | 40 | 55% |
| Fri | 41 | 56% |
| Sat | 35 | 66% |
| Sun | 40 | 55% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…