DL1147
DL1147 (Delta Air Lines) is a multi-stop service on 2 routes, busiest Chicago to Atlanta. Of 1,295 departures recorded from October 2024 to July 2026, 82.0% left on time, according to the US BTS.
- On-time departures82.0%of 1,295 flights
- Average delay10.1 min
- July 202662▲ 0.0%vs July 2025
- Cancelled2.1%
- Legs flown under this number2
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 60 | 62 | ▲ 3.3% |
| February | 56 | 56 | 0.0% |
| March | 62 | 62 | 0.0% |
| April | 60 | 60 | 0.0% |
| May | 62 | 53 | ▼ 14.5% |
| June | 60 | 58 | ▼ 3.3% |
| July | 62 | 62 | 0.0% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 60 | – | – |
| December | 62 | – | – |
| Year to date (Jan–Jul) | 422 | 413 | ▼ 2.1% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 72.4% | 76.8% | ▲ 6.0% |
| February | 89.3% | 83.9% | ▼ 6.0% |
| March | 85.5% | 66.7% | ▼ 22.0% |
| April | 81.7% | 80.0% | ▼ 2.0% |
| May | 77.4% | 88.2% | ▲ 14.0% |
| June | 79.7% | 93.1% | ▲ 16.9% |
| July | 81.4% | 86.4% | ▲ 6.2% |
| August | 88.7% | – | – |
| September | 98.3% | – | – |
| October | 87.1% | – | in progress |
| November | 73.3% | – | – |
| December | 61.7% | – | – |
| Year-to-date average (Jan–Jul) | 81.0% | 82.2% | ▲ 1.4% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 6 | ▲ 200.0% |
| February | 0 | 0 | – |
| March | 0 | 8 | – |
| April | 0 | 0 | – |
| May | 0 | 2 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 3 | 3 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 6 | 19 | ▲ 216.7% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 97.9% 1,268
- Cancelled 2.1% 27
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD ATL Chicago O'Hare International Airport – Hartsfield Jackson Atlanta International Airport | 976 | 14.2 min | 79.5% | 648 |
| ATL ORD Hartsfield Jackson Atlanta International Airport – Chicago O'Hare International Airport | 976 | 5.9 min | 84.5% | 647 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 39 | 39 | 100.0% | 0 |
| November 2024 | 59 | 59 | 81.4% | 0 |
| December 2024 | 56 | 56 | 76.8% | 0 |
| January 2025 | 60 | 58 | 72.4% | 2 |
| February 2025 | 56 | 56 | 89.3% | 0 |
| March 2025 | 62 | 62 | 85.5% | 0 |
| April 2025 | 60 | 60 | 81.7% | 0 |
| May 2025 | 62 | 62 | 77.4% | 0 |
| June 2025 | 60 | 59 | 79.7% | 1 |
| July 2025 | 62 | 59 | 81.4% | 3 |
| August 2025 | 62 | 62 | 88.7% | 0 |
| September 2025 | 60 | 60 | 98.3% | 0 |
| October 2025 | 62 | 62 | 87.1% | 0 |
| November 2025 | 60 | 60 | 73.3% | 0 |
| December 2025 | 62 | 60 | 61.7% | 2 |
| January 2026 | 62 | 56 | 76.8% | 6 |
| February 2026 | 56 | 56 | 83.9% | 0 |
| March 2026 | 62 | 54 | 66.7% | 8 |
| April 2026 | 60 | 60 | 80.0% | 0 |
| May 2026 | 53 | 51 | 88.2% | 2 |
| June 2026 | 58 | 58 | 93.1% | 0 |
| July 2026 | 62 | 59 | 86.4% | 3 |