DL1643
DL1643 (Delta Air Lines) is a multi-stop service on 11 routes, busiest New York to Austin. Of 933 departures recorded from October 2024 to July 2026, 82.6% left on time, according to the US BTS.
- On-time departures82.6%of 933 flights
- Average delay10.8 min
- July 202662▲ 0.0%vs July 2025
- Cancelled1.3%
- Legs flown under this number11
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 | 34 | 10 | ▼ 70.6% |
| February | 32 | 23 | ▼ 28.1% |
| March | 30 | 31 | ▲ 3.3% |
| April | 26 | 28 | ▲ 7.7% |
| May | 25 | 55 | ▲ 120.0% |
| June | 52 | 60 | ▲ 15.4% |
| July | 62 | 62 | 0.0% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 57 | – | – |
| December | 47 | – | – |
| Year to date (Jan–Jul) | 261 | 269 | ▲ 3.1% |
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 | 88.2% | 75.0% | ▼ 15.0% |
| February | 90.6% | 91.3% | ▲ 0.7% |
| March | 73.3% | 86.2% | ▲ 17.6% |
| April | 84.6% | 85.7% | ▲ 1.3% |
| May | 84.0% | 84.9% | ▲ 1.1% |
| June | 74.5% | 86.7% | ▲ 16.3% |
| July | 71.0% | 66.1% | ▼ 6.9% |
| August | 77.4% | – | – |
| September | 93.3% | – | – |
| October | 85.3% | – | in progress |
| November | 91.2% | – | – |
| December | 91.3% | – | – |
| Year-to-date average (Jan–Jul) | 80.9% | 82.3% | ▲ 1.7% |
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 | 2 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 2 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 3 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 1 | 9 | ▲ 800.0% |
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 98.7% 921
- Cancelled 1.3% 12
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| JFK AUS John F. Kennedy International Airport – Austin Bergstrom International Airport | 2,445 | 7.1 min | 85.5% | 431 |
| AUS JFK Austin Bergstrom International Airport – John F. Kennedy International Airport | 2,445 | 15.6 min | 76.7% | 279 |
| LAS LAX Harry Reid International Airport – Los Angeles International Airport | 380 | 5.6 min | 85.3% | 36 |
| HSV ATL Huntsville International Airport – Hartsfield Jackson Atlanta International Airport | 243 | 22.3 min | 83.3% | 36 |
| ATL HSV Hartsfield Jackson Atlanta International Airport – Huntsville International Airport | 243 | 5.4 min | 80.6% | 36 |
| TPA LGA Tampa International Airport – LaGuardia Airport | 1,628 | 12.0 min | 76.7% | 30 |
| ATL FLL Hartsfield Jackson Atlanta International Airport – Fort Lauderdale Hollywood International Airport | 936 | 4.0 min | 89.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 75.0% | 0 |
| November 2024 | 46 | 46 | 80.4% | 0 |
| December 2024 | 49 | 49 | 83.7% | 0 |
| January 2025 | 34 | 34 | 88.2% | 0 |
| February 2025 | 32 | 32 | 90.6% | 0 |
| March 2025 | 30 | 30 | 73.3% | 0 |
| April 2025 | 26 | 26 | 84.6% | 0 |
| May 2025 | 25 | 25 | 84.0% | 0 |
| June 2025 | 52 | 51 | 74.5% | 1 |
| July 2025 | 62 | 62 | 71.0% | 0 |
| August 2025 | 62 | 62 | 77.4% | 0 |
| September 2025 | 60 | 60 | 93.3% | 0 |
| October 2025 | 62 | 61 | 85.3% | 1 |
| November 2025 | 57 | 57 | 91.2% | 0 |
| December 2025 | 47 | 46 | 91.3% | 1 |
| January 2026 | 10 | 8 | 75.0% | 2 |
| February 2026 | 23 | 23 | 91.3% | 0 |
| March 2026 | 31 | 29 | 86.2% | 2 |
| April 2026 | 28 | 28 | 85.7% | 0 |
| May 2026 | 55 | 53 | 84.9% | 2 |
| June 2026 | 60 | 60 | 86.7% | 0 |
| July 2026 | 62 | 59 | 66.1% | 3 |