DL1739
DL1739 (Delta Air Lines) is a multi-stop service on 9 routes, busiest Atlanta to Chicago. Of 773 departures recorded from October 2024 to July 2026, 76.7% left on time, according to the US BTS.
- On-time departures76.7%of 773 flights
- Average delay18.0 min
- July 20261▼ 98.4%vs July 2025
- Cancelled1.9%
- Legs flown under this number9
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 60 | 11 | ▼ 81.7% |
| February | 56 | 29 | ▼ 48.2% |
| March | 39 | 36 | ▼ 7.7% |
| April | 30 | 30 | 0.0% |
| May | 31 | 6 | ▼ 80.6% |
| June | 53 | – | – |
| July | 62 | 1 | ▼ 98.4% |
| August | 41 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 28 | – | – |
| December | 43 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 82.1% | 90.9% | ▲ 10.7% |
| February | 78.6% | 89.7% | ▲ 14.1% |
| March | 69.2% | 77.1% | ▲ 11.4% |
| April | 90.0% | 80.0% | ▼ 11.1% |
| May | 77.4% | 100.0% | ▲ 29.2% |
| June | 49.0% | – | – |
| July | 60.0% | 100.0% | ▲ 66.7% |
| August | 70.7% | – | – |
| September | 73.3% | – | – |
| October | 83.9% | – | in progress |
| November | 73.1% | – | – |
| December | 51.2% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 4 | – | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 2 | – | – |
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 98.1% 758
- Cancelled 1.9% 15
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 4, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL MDW Hartsfield Jackson Atlanta International Airport – Chicago Midway International Airport | 952 | 9.3 min | 79.4% | 315 |
| MDW ATL Chicago Midway International Airport – Hartsfield Jackson Atlanta International Airport | 952 | 21.0 min | 74.2% | 224 |
| ORD SLC Chicago O'Hare International Airport – Salt Lake City International Airport | 2,006 | 43.3 min | 69.3% | 129 |
| VPS ATL Destin-Fort Walton Beach Airport – Hartsfield Jackson Atlanta International Airport | 402 | 11.5 min | 77.1% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 95.0% | 0 |
| November 2024 | 60 | 60 | 88.3% | 0 |
| December 2024 | 56 | 56 | 91.1% | 0 |
| January 2025 | 60 | 56 | 82.1% | 4 |
| February 2025 | 56 | 56 | 78.6% | 0 |
| March 2025 | 39 | 39 | 69.2% | 0 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 53 | 49 | 49.0% | 4 |
| July 2025 | 62 | 60 | 60.0% | 2 |
| August 2025 | 41 | 41 | 70.7% | 0 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 31 | 31 | 83.9% | 0 |
| November 2025 | 28 | 26 | 73.1% | 2 |
| December 2025 | 43 | 41 | 51.2% | 2 |
| January 2026 | 11 | 11 | 90.9% | 0 |
| February 2026 | 29 | 29 | 89.7% | 0 |
| March 2026 | 36 | 35 | 77.1% | 1 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 6 | 6 | 100.0% | 0 |
| July 2026 | 1 | 1 | 100.0% | 0 |