DL1199
DL1199 (Delta Air Lines) flies Atlanta to Chicago. Of 607 departures recorded from October 2024 to July 2026, 75.8% left on time, according to the US BTS.
- On-time departures75.8%of 607 flights
- Average delay15.6 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.5%
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 30 | 31 | ▲ 3.3% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 18 | – | – |
| September | 13 | – | – |
| October | 29 | – | in progress |
| November | 22 | – | – |
| December | 21 | – | – |
| Year to date (Jan–Jul) | 211 | 212 | ▲ 0.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 89.7% | 74.2% | ▼ 17.3% |
| February | 75.0% | 85.7% | ▲ 14.3% |
| March | 83.3% | 75.9% | ▼ 9.0% |
| April | 77.8% | 75.0% | ▼ 3.6% |
| May | 77.4% | 80.7% | ▲ 4.2% |
| June | 55.2% | 75.9% | ▲ 37.5% |
| July | 67.7% | 56.7% | ▼ 16.3% |
| August | 66.7% | – | – |
| September | 100.0% | – | – |
| October | 86.2% | – | in progress |
| November | 57.1% | – | – |
| December | 63.2% | – | – |
| Year-to-date average (Jan–Jul) | 75.2% | 74.8% | ▼ 0.4% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 1 | 2 | ▲ 100.0% |
| April | 3 | 2 | ▼ 33.3% |
| May | 0 | 0 | – |
| June | 1 | 1 | 0.0% |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 6 | 6 | 0.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 97.5% 592
- Cancelled 2.5% 15
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL ORD Hartsfield Jackson Atlanta International Airport – Chicago O'Hare International Airport | 976 | 15.6 min | 75.8% | 607 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 31 | 31 | 67.7% | 0 |
| January 2025 | 30 | 29 | 89.7% | 1 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 31 | 30 | 83.3% | 1 |
| April 2025 | 30 | 27 | 77.8% | 3 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 30 | 29 | 55.2% | 1 |
| July 2025 | 31 | 31 | 67.7% | 0 |
| August 2025 | 18 | 18 | 66.7% | 0 |
| September 2025 | 13 | 13 | 100.0% | 0 |
| October 2025 | 29 | 29 | 86.2% | 0 |
| November 2025 | 22 | 21 | 57.1% | 1 |
| December 2025 | 21 | 19 | 63.2% | 2 |
| January 2026 | 31 | 31 | 74.2% | 0 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 31 | 29 | 75.9% | 2 |
| April 2026 | 30 | 28 | 75.0% | 2 |
| May 2026 | 31 | 31 | 80.7% | 0 |
| June 2026 | 30 | 29 | 75.9% | 1 |
| July 2026 | 31 | 30 | 56.7% | 1 |