Flight OddsUA1857 ORD → MIA
United Airlines · Chicago, IL to Miami, FL · 225 flights observed, 2025-07-01 to 2026-02-11 · 1,197 mi
UA1857 covers more than one route in the data window — the stats below are for ORD → MIA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
71%
Median delay
-8 min
90th percentile
+51 min
Cancellation rate
0%
How often is UA1857 on time?
Across 225 flights on ORD → MIA from 2025-07-01 to 2026-02-11, UA1857 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +51 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 159 | 71% |
| 16-30 min | 24 | 11% |
| 31-60 min | 26 | 12% |
| 61-120 min | 11 | 5% |
| 2+ hrs | 3 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 65% | +12 min |
| 2025-08 | 30 | 60% | +8 min |
| 2025-09 | 30 | 80% | +16 min |
| 2025-10 | 31 | 74% | -1 min |
| 2025-11 | 29 | 72% | +5 min |
| 2025-12 | 31 | 68% | +15 min |
| 2026-01 | 31 | 74% | +1 min |
| 2026-02 | 10 | 90% | -13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 32 | 69% |
| Tue | 33 | 85% |
| Wed | 32 | 81% |
| Thu | 30 | 87% |
| Fri | 32 | 72% |
| Sat | 32 | 56% |
| Sun | 32 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…