DL1537
DL1537 (Delta Air Lines) is a multi-stop service on 9 routes, busiest Detroit to St Louis. Of 713 departures recorded from October 2024 to July 2026, 83.0% left on time, according to the US BTS.
- On-time departures83.0%of 713 flights
- Average delay8.9 min
- July 202631▼ 32.6%vs July 2025
- Cancelled0.8%
- 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 | 4 | 30 | ▲ 650.0% |
| February | – | 28 | – |
| March | 20 | 31 | ▲ 55.0% |
| April | 28 | 30 | ▲ 7.1% |
| May | 46 | 31 | ▼ 32.6% |
| June | 48 | 30 | ▼ 37.5% |
| July | 46 | 31 | ▼ 32.6% |
| August | 41 | – | – |
| September | 32 | – | – |
| October | 46 | – | in progress |
| November | 47 | – | – |
| December | 46 | – | – |
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 | 100.0% | 86.2% | ▼ 13.8% |
| February | – | 89.3% | – |
| March | 90.0% | 86.7% | ▼ 3.7% |
| April | 82.1% | 100.0% | ▲ 21.7% |
| May | 97.8% | 70.0% | ▼ 28.4% |
| June | 75.0% | 93.1% | ▲ 24.1% |
| July | 71.7% | 87.1% | ▲ 21.4% |
| August | 82.9% | – | – |
| September | 90.6% | – | – |
| October | 76.1% | – | in progress |
| November | 70.2% | – | – |
| December | 71.1% | – | – |
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 | 0 | 1 | – |
| February | – | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 1 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
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 99.2% 707
- Cancelled 0.8% 6
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW STL Detroit Metropolitan Wayne County Airport – St. Louis Lambert International Airport | 707 | 7.8 min | 80.2% | 252 |
| STL DTW St. Louis Lambert International Airport – Detroit Metropolitan Wayne County Airport | 707 | 5.1 min | 80.5% | 195 |
| CLT ATL Charlotte Douglas International Airport – Hartsfield Jackson Atlanta International Airport | 365 | 26.7 min | 88.5% | 62 |
| TRI ATL Tri-Cities Regional TN/VA Airport – Hartsfield Jackson Atlanta International Airport | 365 | 20.4 min | 88.9% | 55 |
| AUS MSP Austin Bergstrom International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 1,678 | 4.9 min | 88.6% | 36 |
| LAX LAS Los Angeles International Airport – Harry Reid International Airport | 380 | 15.3 min | 73.3% | 31 |
| DTW IAD Detroit Metropolitan Wayne County Airport – Washington Dulles International Airport | 616 | 3.1 min | 87.1% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 24 | 24 | 95.8% | 0 |
| November 2024 | 32 | 32 | 81.3% | 0 |
| December 2024 | 42 | 42 | 85.7% | 0 |
| January 2025 | 4 | 4 | 100.0% | 0 |
| March 2025 | 20 | 20 | 90.0% | 0 |
| April 2025 | 28 | 28 | 82.1% | 0 |
| May 2025 | 46 | 46 | 97.8% | 0 |
| June 2025 | 48 | 48 | 75.0% | 0 |
| July 2025 | 46 | 46 | 71.7% | 0 |
| August 2025 | 41 | 41 | 82.9% | 0 |
| September 2025 | 32 | 32 | 90.6% | 0 |
| October 2025 | 46 | 46 | 76.1% | 0 |
| November 2025 | 47 | 47 | 70.2% | 0 |
| December 2025 | 46 | 45 | 71.1% | 1 |
| January 2026 | 30 | 29 | 86.2% | 1 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 31 | 30 | 86.7% | 1 |
| April 2026 | 30 | 29 | 100.0% | 1 |
| May 2026 | 31 | 30 | 70.0% | 1 |
| June 2026 | 30 | 29 | 93.1% | 1 |
| July 2026 | 31 | 31 | 87.1% | 0 |