DL1173
DL1173 (Delta Air Lines) is a multi-stop service on 10 routes, busiest Atlanta to Milwaukee. Of 781 departures recorded from October 2024 to July 2026, 80.7% left on time, according to the US BTS.
- On-time departures80.7%of 781 flights
- Average delay8.8 min
- July 202625▼ 51.9%vs July 2025
- Cancelled0.4%
- Legs flown under this number10
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 | 34 | 33 | ▼ 2.9% |
| February | 42 | 24 | ▼ 42.9% |
| March | 58 | 25 | ▼ 56.9% |
| April | 44 | 26 | ▼ 40.9% |
| May | 34 | 25 | ▼ 26.5% |
| June | 32 | 23 | ▼ 28.1% |
| July | 52 | 25 | ▼ 51.9% |
| August | 60 | – | – |
| September | 58 | – | – |
| October | 36 | – | in progress |
| November | 3 | – | – |
| December | 37 | – | – |
| Year to date (Jan–Jul) | 296 | 181 | ▼ 38.9% |
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 | 78.8% | 87.5% | ▲ 11.1% |
| February | 76.2% | 79.2% | ▲ 3.9% |
| March | 77.6% | 80.0% | ▲ 3.1% |
| April | 77.3% | 76.9% | ▼ 0.5% |
| May | 82.4% | 88.0% | ▲ 6.9% |
| June | 38.7% | 82.6% | ▲ 113.4% |
| July | 76.9% | 80.0% | ▲ 4.0% |
| August | 83.3% | – | – |
| September | 93.1% | – | – |
| October | 86.1% | – | in progress |
| November | 66.7% | – | – |
| December | 81.1% | – | – |
| Year-to-date average (Jan–Jul) | 72.5% | 82.0% | ▲ 13.1% |
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 | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 1 | ▼ 50.0% |
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 99.6% 778
- Cancelled 0.4% 3
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL MKE Hartsfield Jackson Atlanta International Airport – General Mitchell International Airport | 1,078 | 8.2 min | 79.8% | 328 |
| MKE ATL General Mitchell International Airport – Hartsfield Jackson Atlanta International Airport | 1,078 | 11.9 min | 81.2% | 256 |
| SLC MSP Salt Lake City International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 1,592 | 5.0 min | 80.7% | 119 |
| MSP CMH Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – John Glenn Columbus International Airport | 1,005 | 5.8 min | 86.5% | 38 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 28 | 28 | 100.0% | 0 |
| November 2024 | 36 | 36 | 91.7% | 0 |
| December 2024 | 46 | 46 | 76.1% | 0 |
| January 2025 | 34 | 33 | 78.8% | 1 |
| February 2025 | 42 | 42 | 76.2% | 0 |
| March 2025 | 58 | 58 | 77.6% | 0 |
| April 2025 | 44 | 44 | 77.3% | 0 |
| May 2025 | 34 | 34 | 82.4% | 0 |
| June 2025 | 32 | 31 | 38.7% | 1 |
| July 2025 | 52 | 52 | 76.9% | 0 |
| August 2025 | 60 | 60 | 83.3% | 0 |
| September 2025 | 58 | 58 | 93.1% | 0 |
| October 2025 | 36 | 36 | 86.1% | 0 |
| November 2025 | 3 | 3 | 66.7% | 0 |
| December 2025 | 37 | 37 | 81.1% | 0 |
| January 2026 | 33 | 32 | 87.5% | 1 |
| February 2026 | 24 | 24 | 79.2% | 0 |
| March 2026 | 25 | 25 | 80.0% | 0 |
| April 2026 | 26 | 26 | 76.9% | 0 |
| May 2026 | 25 | 25 | 88.0% | 0 |
| June 2026 | 23 | 23 | 82.6% | 0 |
| July 2026 | 25 | 25 | 80.0% | 0 |