DL1400
DL1400 (Delta Air Lines) is a multi-stop service on 7 routes, busiest Atlanta to Dulles. Of 942 departures recorded from October 2024 to July 2026, 82.4% left on time, according to the US BTS.
- On-time departures82.4%of 942 flights
- Average delay9.9 min
- July 202662
- Cancelled1.6%
- Legs flown under this number7
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 | 62 | ▲ 3.3% |
| February | 54 | 56 | ▲ 3.7% |
| March | 39 | 62 | ▲ 59.0% |
| April | 30 | 60 | ▲ 100.0% |
| May | 31 | 62 | ▲ 100.0% |
| June | 7 | 60 | ▲ 757.1% |
| July | – | 62 | – |
| August | 7 | – | – |
| September | 8 | – | – |
| October | 10 | – | in progress |
| November | 48 | – | – |
| December | 62 | – | – |
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 | 59.7% | 74.1% | ▲ 24.3% |
| February | 77.8% | 85.7% | ▲ 10.2% |
| March | 79.5% | 79.3% | ▼ 0.2% |
| April | 76.7% | 93.3% | ▲ 21.7% |
| May | 61.3% | 88.7% | ▲ 44.7% |
| June | 85.7% | 90.0% | ▲ 5.0% |
| July | – | 95.2% | – |
| August | 85.7% | – | – |
| September | 100.0% | – | – |
| October | 100.0% | – | in progress |
| November | 82.6% | – | – |
| December | 90.0% | – | – |
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 | 3 | 4 | ▲ 33.3% |
| February | 0 | 0 | – |
| March | 0 | 4 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 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 98.4% 927
- Cancelled 1.6% 15
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL IAD Hartsfield Jackson Atlanta International Airport – Washington Dulles International Airport | 859 | 12.6 min | 77.3% | 253 |
| STL ATL St. Louis Lambert International Airport – Hartsfield Jackson Atlanta International Airport | 779 | 11.1 min | 86.3% | 208 |
| ATL STL Hartsfield Jackson Atlanta International Airport – St. Louis Lambert International Airport | 779 | 5.7 min | 86.8% | 208 |
| IAD ATL Washington Dulles International Airport – Hartsfield Jackson Atlanta International Airport | 859 | 12.4 min | 75.8% | 162 |
| SRQ LGA Sarasota Bradenton International Airport – LaGuardia Airport | 1,687 | 8.5 min | 86.8% | 55 |
| LGA SRQ LaGuardia Airport – Sarasota Bradenton International Airport | 1,687 | 0.0 min | 92.5% | 55 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 87.5% | 0 |
| November 2024 | 60 | 60 | 85.0% | 0 |
| December 2024 | 62 | 62 | 74.2% | 0 |
| January 2025 | 60 | 57 | 59.7% | 3 |
| February 2025 | 54 | 54 | 77.8% | 0 |
| March 2025 | 39 | 39 | 79.5% | 0 |
| April 2025 | 30 | 30 | 76.7% | 0 |
| May 2025 | 31 | 31 | 61.3% | 0 |
| June 2025 | 7 | 7 | 85.7% | 0 |
| August 2025 | 7 | 7 | 85.7% | 0 |
| September 2025 | 8 | 8 | 100.0% | 0 |
| October 2025 | 10 | 10 | 100.0% | 0 |
| November 2025 | 48 | 46 | 82.6% | 2 |
| December 2025 | 62 | 60 | 90.0% | 2 |
| January 2026 | 62 | 58 | 74.1% | 4 |
| February 2026 | 56 | 56 | 85.7% | 0 |
| March 2026 | 62 | 58 | 79.3% | 4 |
| April 2026 | 60 | 60 | 93.3% | 0 |
| May 2026 | 62 | 62 | 88.7% | 0 |
| June 2026 | 60 | 60 | 90.0% | 0 |
| July 2026 | 62 | 62 | 95.2% | 0 |