DL1243
DL1243 (Delta Air Lines) is a multi-stop service on 10 routes, busiest Detroit to Tampa. Of 891 departures recorded from October 2024 to July 2026, 80.1% left on time, according to the US BTS.
- On-time departures80.1%of 891 flights
- Average delay13.0 min
- July 202662▲ 3.3%vs July 2025
- Cancelled1.6%
- Legs flown under this number10
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 | 14 | 31 | ▲ 121.4% |
| February | 18 | 45 | ▲ 150.0% |
| March | 46 | 62 | ▲ 34.8% |
| April | 17 | 42 | ▲ 147.1% |
| May | 31 | 56 | ▲ 80.6% |
| June | 53 | 60 | ▲ 13.2% |
| July | 60 | 62 | ▲ 3.3% |
| August | 52 | – | – |
| September | 20 | – | – |
| October | 18 | – | in progress |
| November | 23 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 239 | 358 | ▲ 49.8% |
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 | 85.7% | 77.4% | ▼ 9.7% |
| February | 72.2% | 71.1% | ▼ 1.5% |
| March | 76.1% | 82.1% | ▲ 8.0% |
| April | 88.2% | 88.1% | ▼ 0.2% |
| May | 80.7% | 67.9% | ▼ 15.9% |
| June | 62.3% | 78.3% | ▲ 25.8% |
| July | 74.1% | 78.3% | ▲ 5.7% |
| August | 80.0% | – | – |
| September | 95.0% | – | – |
| October | 94.4% | – | in progress |
| November | 95.5% | – | – |
| December | 80.0% | – | – |
| Year-to-date average (Jan–Jul) | 77.0% | 77.6% | ▲ 0.7% |
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 | 6 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 2 | 0.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 2 | 8 | ▲ 300.0% |
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 98.4% 877
- Cancelled 1.6% 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW TPA Detroit Metropolitan Wayne County Airport – Tampa International Airport | 1,585 | 10.9 min | 83.1% | 428 |
| TPA DTW Tampa International Airport – Detroit Metropolitan Wayne County Airport | 1,585 | 26.9 min | 68.1% | 219 |
| TUL ATL Tulsa International Airport – Hartsfield Jackson Atlanta International Airport | 1,082 | 3.1 min | 89.7% | 68 |
| ATL TUL Hartsfield Jackson Atlanta International Airport – Tulsa International Airport | 1,082 | 2.3 min | 88.2% | 68 |
| STL MSP St. Louis Lambert International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 722 | 9.0 min | 78.8% | 33 |
| JAX LGA Jacksonville International Airport – LaGuardia Airport | 1,343 | 4.4 min | 90.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 85.0% | 0 |
| November 2024 | 60 | 60 | 91.7% | 0 |
| December 2024 | 50 | 50 | 90.0% | 0 |
| January 2025 | 14 | 14 | 85.7% | 0 |
| February 2025 | 18 | 18 | 72.2% | 0 |
| March 2025 | 46 | 46 | 76.1% | 0 |
| April 2025 | 17 | 17 | 88.2% | 0 |
| May 2025 | 31 | 31 | 80.7% | 0 |
| June 2025 | 53 | 53 | 62.3% | 0 |
| July 2025 | 60 | 58 | 74.1% | 2 |
| August 2025 | 52 | 50 | 80.0% | 2 |
| September 2025 | 20 | 20 | 95.0% | 0 |
| October 2025 | 18 | 18 | 94.4% | 0 |
| November 2025 | 23 | 22 | 95.5% | 1 |
| December 2025 | 31 | 30 | 80.0% | 1 |
| January 2026 | 31 | 31 | 77.4% | 0 |
| February 2026 | 45 | 45 | 71.1% | 0 |
| March 2026 | 62 | 56 | 82.1% | 6 |
| April 2026 | 42 | 42 | 88.1% | 0 |
| May 2026 | 56 | 56 | 67.9% | 0 |
| June 2026 | 60 | 60 | 78.3% | 0 |
| July 2026 | 62 | 60 | 78.3% | 2 |