Flight OddsUA4171 BHM → ORD
United Airlines · Birmingham, AL to Chicago, IL · 245 flights observed, 2025-07-01 to 2026-05-20 · 584 mi
UA4171 covers more than one route in the data window — the stats below are for BHM → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
68%
Median delay
-2 min
90th percentile
+124 min
Cancellation rate
3%
How often is UA4171 on time?
Across 245 flights on BHM → ORD from 2025-07-01 to 2026-05-20, UA4171 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +124 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 | 159 | 68% |
| 16-30 min | 13 | 6% |
| 31-60 min | 18 | 8% |
| 61-120 min | 19 | 8% |
| 2+ hrs | 26 | 11% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 59% | +62 min |
| 2025-08 | 18 | 83% | +26 min |
| 2025-09 | 6 | 83% | 0 min |
| 2025-10 | 30 | 80% | +14 min |
| 2025-11 | 26 | 69% | +23 min |
| 2025-12 | 31 | 55% | +78 min |
| 2026-01 | 23 | 83% | +5 min |
| 2026-03 | 26 | 46% | +91 min |
| 2026-04 | 28 | 75% | +15 min |
| 2026-05 | 18 | 61% | +35 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 33 | 67% |
| Tue | 34 | 65% |
| Wed | 34 | 59% |
| Thu | 31 | 74% |
| Fri | 35 | 66% |
| Sat | 34 | 79% |
| Sun | 34 | 65% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…