DL1557
DL1557 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Detroit to Nashville. Of 1,056 departures recorded from October 2024 to July 2026, 86.6% left on time, according to the US BTS.
- On-time departures86.6%of 1,056 flights
- Average delay5.4 min
- July 202662▲ 10.7%vs July 2025
- Cancelled1.1%
- Legs flown under this number3
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 | 24 | ▼ 29.4% |
| February | 36 | 22 | ▼ 38.9% |
| March | 52 | 51 | ▼ 1.9% |
| April | 52 | 58 | ▲ 11.5% |
| May | 50 | 53 | ▲ 6.0% |
| June | 58 | 58 | 0.0% |
| July | 56 | 62 | ▲ 10.7% |
| August | 62 | – | – |
| September | 54 | – | – |
| October | 58 | – | in progress |
| November | 58 | – | – |
| December | 58 | – | – |
| Year to date (Jan–Jul) | 338 | 328 | ▼ 3.0% |
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 | 88.2% | 90.9% | ▲ 3.0% |
| February | 88.9% | 90.9% | ▲ 2.3% |
| March | 90.4% | 79.6% | ▼ 11.9% |
| April | 94.2% | 79.3% | ▼ 15.8% |
| May | 86.0% | 92.5% | ▲ 7.5% |
| June | 84.5% | 81.0% | ▼ 4.1% |
| July | 67.9% | 90.0% | ▲ 32.6% |
| August | 98.4% | – | – |
| September | 96.3% | – | – |
| October | 98.3% | – | in progress |
| November | 75.9% | – | – |
| December | 88.5% | – | – |
| Year-to-date average (Jan–Jul) | 85.7% | 86.3% | ▲ 0.7% |
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 | 0 | 2 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 6 | – | – |
| Year to date (Jan–Jul) | 0 | 6 |
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 98.9% 1,044
- Cancelled 1.1% 12
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW BNA Detroit Metropolitan Wayne County Airport – Nashville International Airport | 735 | 3.3 min | 86.3% | 524 |
| BNA DTW Nashville International Airport – Detroit Metropolitan Wayne County Airport | 735 | 7.7 min | 86.8% | 521 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 24 | 24 | 100.0% | 0 |
| November 2024 | 34 | 34 | 85.3% | 0 |
| December 2024 | 42 | 42 | 66.7% | 0 |
| January 2025 | 34 | 34 | 88.2% | 0 |
| February 2025 | 36 | 36 | 88.9% | 0 |
| March 2025 | 52 | 52 | 90.4% | 0 |
| April 2025 | 52 | 52 | 94.2% | 0 |
| May 2025 | 50 | 50 | 86.0% | 0 |
| June 2025 | 58 | 58 | 84.5% | 0 |
| July 2025 | 56 | 56 | 67.9% | 0 |
| August 2025 | 62 | 62 | 98.4% | 0 |
| September 2025 | 54 | 54 | 96.3% | 0 |
| October 2025 | 58 | 58 | 98.3% | 0 |
| November 2025 | 58 | 58 | 75.9% | 0 |
| December 2025 | 58 | 52 | 88.5% | 6 |
| January 2026 | 24 | 22 | 90.9% | 2 |
| February 2026 | 22 | 22 | 90.9% | 0 |
| March 2026 | 51 | 49 | 79.6% | 2 |
| April 2026 | 58 | 58 | 79.3% | 0 |
| May 2026 | 53 | 53 | 92.5% | 0 |
| June 2026 | 58 | 58 | 81.0% | 0 |
| July 2026 | 62 | 60 | 90.0% | 2 |