Flight OddsUA1239 JAX → ORD
United Airlines · Jacksonville, FL to Chicago, IL · 153 flights observed, 2025-08-19 to 2026-04-29 · 864 mi
UA1239 covers more than one route in the data window — the stats below are for JAX → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
82%
Median delay
-8 min
90th percentile
+27 min
Cancellation rate
1%
How often is UA1239 on time?
Across 153 flights on JAX → ORD from 2025-08-19 to 2026-04-29, UA1239 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +27 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 124 | 82% |
| 16-30 min | 14 | 9% |
| 31-60 min | 3 | 2% |
| 61-120 min | 2 | 1% |
| 2+ hrs | 8 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 13 | 92% | -1 min |
| 2025-09 | 30 | 70% | +2 min |
| 2025-10 | 30 | 93% | -3 min |
| 2025-11 | 29 | 72% | +23 min |
| 2025-12 | 1 | 100% | -27 min |
| 2026-03 | 19 | 74% | +20 min |
| 2026-04 | 29 | 93% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 22 | 91% |
| Tue | 20 | 70% |
| Wed | 20 | 90% |
| Thu | 23 | 87% |
| Fri | 22 | 73% |
| Sat | 22 | 86% |
| Sun | 22 | 77% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…