DL1578
DL1578 (Delta Air Lines) is a multi-stop service on 12 routes, busiest Fort Lauderdale to Boston. Of 542 departures recorded from October 2024 to July 2026, 86.1% left on time, according to the US BTS.
- On-time departures86.1%of 542 flights
- Average delay9.2 min
- July 202615▼ 51.6%vs July 2025
- Cancelled0.6%
- Legs flown under this number12
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 | 31 | 22 | ▼ 29.0% |
| February | 28 | 30 | ▲ 7.1% |
| March | 31 | 33 | ▲ 6.5% |
| April | 30 | 28 | ▼ 6.7% |
| May | 31 | 31 | 0.0% |
| June | 21 | 29 | ▲ 38.1% |
| July | 31 | 15 | ▼ 51.6% |
| August | 31 | – | – |
| September | 19 | – | – |
| October | 4 | – | in progress |
| November | 4 | – | – |
| December | 14 | – | – |
| Year to date (Jan–Jul) | 203 | 188 | ▼ 7.4% |
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 | 83.9% | 68.2% | ▼ 18.7% |
| February | 85.7% | 80.0% | ▼ 6.7% |
| March | 90.0% | 63.6% | ▼ 29.3% |
| April | 96.7% | 71.4% | ▼ 26.1% |
| May | 83.9% | 87.1% | ▲ 3.9% |
| June | 80.0% | 96.4% | ▲ 20.5% |
| July | 93.6% | 93.3% | ▼ 0.2% |
| August | 96.8% | – | – |
| September | 94.7% | – | – |
| October | 100.0% | – | in progress |
| November | 100.0% | – | – |
| December | 85.7% | – | – |
| Year-to-date average (Jan–Jul) | 87.7% | 80.0% | ▼ 8.7% |
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 | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 1 | 0.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 1 | ▼ 50.0% |
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 99.4% 539
- Cancelled 0.6% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 27, 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 |
|---|---|---|---|---|
| FLL BOS Fort Lauderdale Hollywood International Airport – Boston Logan International Airport | 1,994 | 8.8 min | 86.5% | 186 |
| FCA MSP Glacier Park International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 1,646 | 3.2 min | 93.9% | 133 |
| SEA ORD Seattle–Tacoma International Airport – Chicago O'Hare International Airport | 2,762 | 4.7 min | 91.0% | 67 |
| RDU DTW Raleigh-Durham International Airport – Detroit Metropolitan Wayne County Airport | 807 | 38.6 min | 64.5% | 31 |
| MIA JFK Miami International Airport – John F. Kennedy International Airport | 1,757 | 6.5 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 30 | 30 | 83.3% | 0 |
| January 2025 | 31 | 31 | 83.9% | 0 |
| February 2025 | 28 | 28 | 85.7% | 0 |
| March 2025 | 31 | 30 | 90.0% | 1 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 21 | 20 | 80.0% | 1 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 31 | 96.8% | 0 |
| September 2025 | 19 | 19 | 94.7% | 0 |
| October 2025 | 4 | 4 | 100.0% | 0 |
| November 2025 | 4 | 4 | 100.0% | 0 |
| December 2025 | 14 | 14 | 85.7% | 0 |
| January 2026 | 22 | 22 | 68.2% | 0 |
| February 2026 | 30 | 30 | 80.0% | 0 |
| March 2026 | 33 | 33 | 63.6% | 0 |
| April 2026 | 28 | 28 | 71.4% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 29 | 28 | 96.4% | 1 |
| July 2026 | 15 | 15 | 93.3% | 0 |