DL1257
DL1257 (Delta Air Lines) is a multi-stop service on 2 routes, busiest Atlanta to Baltimore. Of 601 departures recorded from October 2024 to July 2026, 71.9% left on time, according to the US BTS.
- On-time departures71.9%of 601 flights
- Average delay21.3 min
- July 202631▲ 6.9%vs July 2025
- Cancelled1.2%
- Legs flown under this number2
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 | 25 | 16 | ▼ 36.0% |
| February | 17 | 26 | ▲ 52.9% |
| March | 31 | 31 | 0.0% |
| April | 30 | 28 | ▼ 6.7% |
| May | 31 | 29 | ▼ 6.5% |
| June | 30 | 30 | 0.0% |
| July | 29 | 31 | ▲ 6.9% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 21 | – | in progress |
| November | 28 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 193 | 191 | ▼ 1.0% |
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 | 66.7% | 60.0% | ▼ 10.0% |
| February | 76.5% | 92.3% | ▲ 20.7% |
| March | 77.4% | 56.7% | ▼ 26.8% |
| April | 63.3% | 92.6% | ▲ 46.2% |
| May | 77.4% | 75.9% | ▼ 2.0% |
| June | 41.4% | 80.0% | ▲ 93.3% |
| July | 48.3% | 30.0% | ▼ 37.9% |
| August | 74.2% | – | – |
| September | 76.7% | – | – |
| October | 85.7% | – | in progress |
| November | 81.5% | – | – |
| December | 89.3% | – | – |
| Year-to-date average (Jan–Jul) | 64.4% | 69.6% | ▲ 8.1% |
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 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 100.0% |
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 98.8% 594
- Cancelled 1.2% 7
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 BWI Hartsfield Jackson Atlanta International Airport – Baltimore/Washington International Thurgood Marshall Airport | 928 | 21.8 min | 71.2% | 577 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 89.5% | 0 |
| November 2024 | 29 | 29 | 82.8% | 0 |
| December 2024 | 31 | 31 | 74.2% | 0 |
| January 2025 | 25 | 24 | 66.7% | 1 |
| February 2025 | 17 | 17 | 76.5% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 30 | 30 | 63.3% | 0 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 30 | 29 | 41.4% | 1 |
| July 2025 | 29 | 29 | 48.3% | 0 |
| August 2025 | 31 | 31 | 74.2% | 0 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 21 | 21 | 85.7% | 0 |
| November 2025 | 28 | 27 | 81.5% | 1 |
| December 2025 | 28 | 28 | 89.3% | 0 |
| January 2026 | 16 | 15 | 60.0% | 1 |
| February 2026 | 26 | 26 | 92.3% | 0 |
| March 2026 | 31 | 30 | 56.7% | 1 |
| April 2026 | 28 | 27 | 92.6% | 1 |
| May 2026 | 29 | 29 | 75.9% | 0 |
| June 2026 | 30 | 30 | 80.0% | 0 |
| July 2026 | 31 | 30 | 30.0% | 1 |