DL1439
DL1439 (Delta Air Lines) is a multi-stop service on 2 routes, busiest Boston to Tampa. Of 1,087 departures recorded from October 2024 to July 2026, 66.8% left on time, according to the US BTS.
- On-time departures66.8%of 1,087 flights
- Average delay25.1 min
- July 202661▲ 10.9%vs July 2025
- Cancelled2.0%
- Legs flown under this number2
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 | 56 | 48 | ▼ 14.3% |
| February | 54 | 48 | ▼ 11.1% |
| March | 62 | 60 | ▼ 3.2% |
| April | 43 | 60 | ▲ 39.5% |
| May | 56 | 62 | ▲ 10.7% |
| June | 60 | 60 | 0.0% |
| July | 55 | 61 | ▲ 10.9% |
| August | 53 | – | – |
| September | 48 | – | – |
| October | 54 | – | in progress |
| November | 49 | – | – |
| December | 46 | – | – |
| Year to date (Jan–Jul) | 386 | 399 | ▲ 3.4% |
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 | 75.0% | 80.0% | ▲ 6.7% |
| February | 68.5% | 56.8% | ▼ 17.1% |
| March | 66.7% | 75.9% | ▲ 13.8% |
| April | 58.5% | 85.0% | ▲ 45.2% |
| May | 62.5% | 85.0% | ▲ 36.0% |
| June | 48.3% | 66.7% | ▲ 37.9% |
| July | 32.7% | 61.0% | ▲ 86.4% |
| August | 79.3% | – | – |
| September | 56.3% | – | – |
| October | 50.9% | – | in progress |
| November | 75.5% | – | – |
| December | 61.9% | – | – |
| Year-to-date average (Jan–Jul) | 58.9% | 72.9% | ▲ 23.8% |
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 | 3 | – |
| February | 0 | 4 | – |
| March | 2 | 2 | 0.0% |
| April | 2 | 0 | ▼ 100.0% |
| May | 0 | 2 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 4 | – | – |
| Year to date (Jan–Jul) | 4 | 13 | ▲ 225.0% |
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 98.0% 1,065
- Cancelled 2.0% 22
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS TPA Boston Logan International Airport – Tampa International Airport | 1,908 | 20.7 min | 68.9% | 582 |
| TPA BOS Tampa International Airport – Boston Logan International Airport | 1,908 | 30.3 min | 64.3% | 505 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 66.7% | 0 |
| November 2024 | 15 | 15 | 93.3% | 0 |
| December 2024 | 28 | 28 | 85.7% | 0 |
| January 2025 | 56 | 56 | 75.0% | 0 |
| February 2025 | 54 | 54 | 68.5% | 0 |
| March 2025 | 62 | 60 | 66.7% | 2 |
| April 2025 | 43 | 41 | 58.5% | 2 |
| May 2025 | 56 | 56 | 62.5% | 0 |
| June 2025 | 60 | 60 | 48.3% | 0 |
| July 2025 | 55 | 55 | 32.7% | 0 |
| August 2025 | 53 | 53 | 79.3% | 0 |
| September 2025 | 48 | 48 | 56.3% | 0 |
| October 2025 | 54 | 53 | 50.9% | 1 |
| November 2025 | 49 | 49 | 75.5% | 0 |
| December 2025 | 46 | 42 | 61.9% | 4 |
| January 2026 | 48 | 45 | 80.0% | 3 |
| February 2026 | 48 | 44 | 56.8% | 4 |
| March 2026 | 60 | 58 | 75.9% | 2 |
| April 2026 | 60 | 60 | 85.0% | 0 |
| May 2026 | 62 | 60 | 85.0% | 2 |
| June 2026 | 60 | 60 | 66.7% | 0 |
| July 2026 | 61 | 59 | 61.0% | 2 |