Flight OddsDL1139 ATL → ORD
Delta Air Lines · Atlanta, GA to Chicago, IL · 250 flights observed, 2025-07-01 to 2026-06-28 · 606 mi
DL1139 covers more than one route in the data window — the stats below are for ATL → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
58%
Median delay
+9 min
90th percentile
+93 min
Cancellation rate
1%
How often is DL1139 on time?
Across 250 flights on ATL → ORD from 2025-07-01 to 2026-06-28, DL1139 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +9 min, and the worst 10% of flights arrived +93 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 | 143 | 58% |
| 16-30 min | 32 | 13% |
| 31-60 min | 33 | 13% |
| 61-120 min | 19 | 8% |
| 2+ hrs | 18 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 25 | 48% | +61 min |
| 2025-08 | 29 | 69% | +22 min |
| 2025-09 | 30 | 83% | -1 min |
| 2025-10 | 18 | 67% | +16 min |
| 2025-11 | 22 | 68% | +64 min |
| 2025-12 | 31 | 61% | +22 min |
| 2026-01 | 11 | 64% | +31 min |
| 2026-02 | 6 | 83% | +1 min |
| 2026-03 | 20 | 20% | +66 min |
| 2026-04 | 21 | 48% | +59 min |
| 2026-05 | 26 | 35% | +33 min |
| 2026-06 | 6 | 83% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 41 | 54% |
| Tue | 27 | 56% |
| Wed | 35 | 60% |
| Thu | 40 | 53% |
| Fri | 39 | 64% |
| Sat | 21 | 71% |
| Sun | 42 | 57% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…