DL1234
DL1234 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Atlanta to Miami. Of 451 departures recorded from October 2024 to July 2026, 59.5% left on time, according to the US BTS.
- On-time departures59.5%of 451 flights
- Average delay25.6 min
- July 202621▲ 40.0%vs July 2025
- Cancelled0.9%
- 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 | 11 | 22 | ▲ 100.0% |
| February | 13 | 18 | ▲ 38.5% |
| March | 23 | 29 | ▲ 26.1% |
| April | 18 | 22 | ▲ 22.2% |
| May | 25 | 20 | ▼ 20.0% |
| June | 18 | 4 | ▼ 77.8% |
| July | 15 | 21 | ▲ 40.0% |
| August | 26 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 123 | 136 | ▲ 10.6% |
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 | 63.6% | 54.6% | ▼ 14.3% |
| February | 61.5% | 72.2% | ▲ 17.4% |
| March | 47.8% | 44.8% | ▼ 6.3% |
| April | 50.0% | 54.6% | ▲ 9.1% |
| May | 48.0% | 70.0% | ▲ 45.8% |
| June | 47.1% | 100.0% | ▲ 112.5% |
| July | 42.9% | 42.1% | ▼ 1.7% |
| August | 61.5% | – | – |
| September | 73.3% | – | – |
| October | 77.4% | – | in progress |
| November | 73.3% | – | – |
| December | 48.3% | – | – |
| Year-to-date average (Jan–Jul) | 51.6% | 62.6% | ▲ 21.4% |
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 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 99.1% 447
- Cancelled 0.9% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL MIA Hartsfield Jackson Atlanta International Airport – Miami International Airport | 959 | 26.2 min | 58.9% | 437 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 76.9% | 0 |
| November 2024 | 13 | 13 | 76.9% | 0 |
| December 2024 | 20 | 20 | 55.0% | 0 |
| January 2025 | 11 | 11 | 63.6% | 0 |
| February 2025 | 13 | 13 | 61.5% | 0 |
| March 2025 | 23 | 23 | 47.8% | 0 |
| April 2025 | 18 | 18 | 50.0% | 0 |
| May 2025 | 25 | 25 | 48.0% | 0 |
| June 2025 | 18 | 17 | 47.1% | 1 |
| July 2025 | 15 | 14 | 42.9% | 1 |
| August 2025 | 26 | 26 | 61.5% | 0 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 31 | 31 | 77.4% | 0 |
| November 2025 | 30 | 30 | 73.3% | 0 |
| December 2025 | 29 | 29 | 48.3% | 0 |
| January 2026 | 22 | 22 | 54.6% | 0 |
| February 2026 | 18 | 18 | 72.2% | 0 |
| March 2026 | 29 | 29 | 44.8% | 0 |
| April 2026 | 22 | 22 | 54.6% | 0 |
| May 2026 | 20 | 20 | 70.0% | 0 |
| June 2026 | 4 | 4 | 100.0% | 0 |
| July 2026 | 21 | 19 | 42.1% | 2 |