DL1550
DL1550 (Delta Air Lines) is a multi-stop service on 6 routes, busiest Atlanta to Raleigh. Of 1,016 departures recorded from October 2024 to July 2026, 81.3% left on time, according to the US BTS.
- On-time departures81.3%of 1,016 flights
- Average delay10.5 min
- July 202656▼ 9.7%vs July 2025
- Cancelled1.4%
- Legs flown under this number6
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 24 | 57 | ▲ 137.5% |
| February | 26 | 56 | ▲ 115.4% |
| March | 31 | 62 | ▲ 100.0% |
| April | 47 | 60 | ▲ 27.7% |
| May | 62 | 62 | 0.0% |
| June | 60 | 50 | ▼ 16.7% |
| July | 62 | 56 | ▼ 9.7% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 56 | – | – |
| December | 50 | – | – |
| Year to date (Jan–Jul) | 312 | 403 | ▲ 29.2% |
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 periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 95.7% | 90.7% | ▼ 5.1% |
| February | 100.0% | 69.6% | ▼ 30.4% |
| March | 54.8% | 62.9% | ▲ 14.7% |
| April | 89.1% | 83.3% | ▼ 6.5% |
| May | 72.6% | 83.9% | ▲ 15.6% |
| June | 75.0% | 85.1% | ▲ 13.5% |
| July | 80.7% | 76.8% | ▼ 4.8% |
| August | 80.0% | – | – |
| September | 95.0% | – | – |
| October | 90.3% | – | in progress |
| November | 87.0% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 81.1% | 78.9% | ▼ 2.7% |
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 periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 3 | ▲ 200.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 3 | – |
| July | 0 | 0 | – |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 2 | 6 | ▲ 200.0% |
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 98.6% 1,002
- Cancelled 1.4% 14
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| RDU ATL Raleigh-Durham International Airport – Hartsfield Jackson Atlanta International Airport | 572 | 13.3 min | 78.5% | 448 |
| ATL RDU Hartsfield Jackson Atlanta International Airport – Raleigh-Durham International Airport | 572 | 6.7 min | 85.1% | 448 |
| AUS ATL Austin Bergstrom International Airport – Hartsfield Jackson Atlanta International Airport | 1,305 | 7.2 min | 93.0% | 58 |
| DCA ATL Ronald Reagan Washington National Airport – Hartsfield Jackson Atlanta International Airport | 880 | 18.8 min | 60.0% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 81.8% | 0 |
| January 2025 | 24 | 23 | 95.7% | 1 |
| February 2025 | 26 | 26 | 100.0% | 0 |
| March 2025 | 31 | 31 | 54.8% | 0 |
| April 2025 | 47 | 46 | 89.1% | 1 |
| May 2025 | 62 | 62 | 72.6% | 0 |
| June 2025 | 60 | 60 | 75.0% | 0 |
| July 2025 | 62 | 62 | 80.7% | 0 |
| August 2025 | 62 | 60 | 80.0% | 2 |
| September 2025 | 60 | 60 | 95.0% | 0 |
| October 2025 | 62 | 62 | 90.3% | 0 |
| November 2025 | 56 | 54 | 87.0% | 2 |
| December 2025 | 50 | 48 | 83.3% | 2 |
| January 2026 | 57 | 54 | 90.7% | 3 |
| February 2026 | 56 | 56 | 69.6% | 0 |
| March 2026 | 62 | 62 | 62.9% | 0 |
| April 2026 | 60 | 60 | 83.3% | 0 |
| May 2026 | 62 | 62 | 83.9% | 0 |
| June 2026 | 50 | 47 | 85.1% | 3 |
| July 2026 | 56 | 56 | 76.8% | 0 |