Flight OddsUA1639 MIA → ORD
United Airlines · Miami, FL to Chicago, IL · 53 flights observed, 2025-12-04 to 2026-03-28 · 1,197 mi
UA1639 covers more than one route in the data window — the stats below are for MIA → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
51%
Median delay
+15 min
90th percentile
+98 min
Cancellation rate
4%
How often is UA1639 on time?
Across 53 flights on MIA → ORD from 2025-12-04 to 2026-03-28, UA1639 arrived within 15 minutes of schedule 51% of the time. The median arrival delay was +15 min, and the worst 10% of flights arrived +98 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 26 | 51% |
| 16-30 min | 10 | 20% |
| 31-60 min | 6 | 12% |
| 61-120 min | 4 | 8% |
| 2+ hrs | 5 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 8 | 63% | +34 min |
| 2026-01 | 11 | 73% | +18 min |
| 2026-02 | 14 | 43% | +28 min |
| 2026-03 | 18 | 39% | +44 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 63% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 14 | 71% |
| Fri | 14 | 43% |
| Sat | 4 | 25% |
| Sun | 11 | 36% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…