DL551
DL551 (Delta Air Lines) is a multi-stop service on 15 routes, busiest Dallas-Fort Worth to New York. Of 610 departures recorded from October 2024 to July 2026, 82.6% left on time, according to the US BTS.
- On-time departures82.6%of 610 flights
- Average delay14.2 min
- July 202627▼ 3.6%vs July 2025
- Cancelled1.8%
- Legs flown under this number15
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 | 20 | 24 | ▲ 20.0% |
| February | 27 | 20 | ▼ 25.9% |
| March | 31 | 53 | ▲ 71.0% |
| April | 29 | 29 | 0.0% |
| May | 29 | 30 | ▲ 3.4% |
| June | 30 | 26 | ▼ 13.3% |
| July | 28 | 27 | ▼ 3.6% |
| August | 26 | – | – |
| September | 27 | – | – |
| October | 27 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 194 | 209 | ▲ 7.7% |
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 | 75.0% | 83.3% | ▲ 11.1% |
| February | 77.8% | 94.7% | ▲ 21.8% |
| March | 77.4% | 65.3% | ▼ 15.6% |
| April | 58.6% | 69.0% | ▲ 17.7% |
| May | 82.8% | 93.3% | ▲ 12.8% |
| June | 71.4% | 96.0% | ▲ 34.4% |
| July | 92.9% | 88.5% | ▼ 4.7% |
| August | 92.0% | – | – |
| September | 88.9% | – | – |
| October | 85.2% | – | in progress |
| November | 88.5% | – | – |
| December | 78.6% | – | – |
| Year-to-date average (Jan–Jul) | 76.6% | 84.3% | ▲ 10.1% |
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 | 0 | 0 | – |
| February | 0 | 1 | – |
| March | 0 | 4 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 2 | 1 | ▼ 50.0% |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 2 | 7 | ▲ 250.0% |
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 98.2% 599
- Cancelled 1.8% 11
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DFW LGA Dallas Fort Worth International Airport – LaGuardia Airport | 2,231 | 9.5 min | 88.5% | 345 |
| SNA DTW John Wayne Orange County International Airport – Detroit Metropolitan Wayne County Airport | 3,148 | 34.4 min | 64.7% | 51 |
| ORD LGA Chicago O'Hare International Airport – LaGuardia Airport | 1,177 | -0.8 min | 88.6% | 45 |
| SFO ATL San Francisco International Airport – Hartsfield Jackson Atlanta International Airport | 3,435 | 32.4 min | 79.1% | 43 |
| DTW MCO Detroit Metropolitan Wayne County Airport – Orlando International Airport | 1,544 | 17.8 min | 77.4% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 94.4% | 0 |
| November 2024 | 26 | 26 | 92.3% | 0 |
| December 2024 | 28 | 28 | 96.4% | 0 |
| January 2025 | 20 | 20 | 75.0% | 0 |
| February 2025 | 27 | 27 | 77.8% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 29 | 29 | 58.6% | 0 |
| May 2025 | 29 | 29 | 82.8% | 0 |
| June 2025 | 30 | 28 | 71.4% | 2 |
| July 2025 | 28 | 28 | 92.9% | 0 |
| August 2025 | 26 | 25 | 92.0% | 1 |
| September 2025 | 27 | 27 | 88.9% | 0 |
| October 2025 | 27 | 27 | 85.2% | 0 |
| November 2025 | 26 | 26 | 88.5% | 0 |
| December 2025 | 29 | 28 | 78.6% | 1 |
| January 2026 | 24 | 24 | 83.3% | 0 |
| February 2026 | 20 | 19 | 94.7% | 1 |
| March 2026 | 53 | 49 | 65.3% | 4 |
| April 2026 | 29 | 29 | 69.0% | 0 |
| May 2026 | 30 | 30 | 93.3% | 0 |
| June 2026 | 26 | 25 | 96.0% | 1 |
| July 2026 | 27 | 26 | 88.5% | 1 |