DL1638
DL1638 (Delta Air Lines) is a multi-stop service on 2 routes, busiest New York to West Palm Beach. Of 901 departures recorded from October 2024 to July 2026, 69.6% left on time, according to the US BTS.
- On-time departures69.6%of 901 flights
- Average delay27.4 min
- July 202662▲ 77.1%vs July 2025
- Cancelled4.0%
- 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 | 61 | 35 | ▼ 42.6% |
| February | 53 | 45 | ▼ 15.1% |
| March | 37 | 62 | ▲ 67.6% |
| April | 30 | 42 | ▲ 40.0% |
| May | 31 | 56 | ▲ 80.6% |
| June | 33 | 60 | ▲ 81.8% |
| July | 35 | 62 | ▲ 77.1% |
| August | 33 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 43 | – | – |
| Year to date (Jan–Jul) | 280 | 362 | ▲ 29.3% |
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 | 60.7% | 73.5% | ▲ 21.2% |
| February | 51.0% | 65.9% | ▲ 29.2% |
| March | 56.8% | 64.9% | ▲ 14.4% |
| April | 86.7% | 67.5% | ▼ 22.1% |
| May | 74.2% | 80.0% | ▲ 7.8% |
| June | 59.4% | 75.9% | ▲ 27.8% |
| July | 68.8% | 58.9% | ▼ 14.3% |
| August | 83.3% | – | – |
| September | 76.7% | – | – |
| October | 76.7% | – | in progress |
| November | 71.4% | – | – |
| December | 64.1% | – | – |
| Year-to-date average (Jan–Jul) | 65.3% | 69.5% | ▲ 6.4% |
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 | 1 | – |
| February | 2 | 4 | ▲ 100.0% |
| March | 0 | 5 | – |
| April | 0 | 2 | – |
| May | 0 | 1 | – |
| June | 1 | 2 | ▲ 100.0% |
| July | 3 | 6 | ▲ 100.0% |
| August | 3 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 1 | – | – |
| December | 4 | – | – |
| Year to date (Jan–Jul) | 6 | 21 | ▲ 250.0% |
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 96.0% 865
- Cancelled 4.0% 36
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| JFK DJT John F. Kennedy International Airport – President Donald J. Trump International Airport | 1,657 | 20.6 min | 74.6% | 656 |
| DJT JFK President Donald J. Trump International Airport – John F. Kennedy International Airport | 1,657 | 46.1 min | 55.8% | 245 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 29 | 29 | 96.6% | 0 |
| December 2024 | 44 | 44 | 63.6% | 0 |
| January 2025 | 61 | 61 | 60.7% | 0 |
| February 2025 | 53 | 51 | 51.0% | 2 |
| March 2025 | 37 | 37 | 56.8% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 31 | 31 | 74.2% | 0 |
| June 2025 | 33 | 32 | 59.4% | 1 |
| July 2025 | 35 | 32 | 68.8% | 3 |
| August 2025 | 33 | 30 | 83.3% | 3 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 31 | 30 | 76.7% | 1 |
| November 2025 | 29 | 28 | 71.4% | 1 |
| December 2025 | 43 | 39 | 64.1% | 4 |
| January 2026 | 35 | 34 | 73.5% | 1 |
| February 2026 | 45 | 41 | 65.9% | 4 |
| March 2026 | 62 | 57 | 64.9% | 5 |
| April 2026 | 42 | 40 | 67.5% | 2 |
| May 2026 | 56 | 55 | 80.0% | 1 |
| June 2026 | 60 | 58 | 75.9% | 2 |
| July 2026 | 62 | 56 | 58.9% | 6 |