DL1143
DL1143 (Delta Air Lines) is a multi-stop service on 2 routes, busiest Los Angeles to Houston. Of 834 departures recorded from October 2024 to July 2026, 86.1% left on time, according to the US BTS.
- On-time departures86.1%of 834 flights
- Average delay6.6 min
- July 202655▲ 77.4%vs July 2025
- Cancelled0.7%
- 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 | 57 | 34 | ▼ 40.4% |
| February | 50 | 28 | ▼ 44.0% |
| March | 37 | 31 | ▼ 16.2% |
| April | 30 | 30 | 0.0% |
| May | 31 | 51 | ▲ 64.5% |
| June | 30 | 53 | ▲ 76.7% |
| July | 31 | 55 | ▲ 77.4% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 40 | – | – |
| Year to date (Jan–Jul) | 266 | 282 | ▲ 6.0% |
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 | 76.4% | 93.9% | ▲ 23.0% |
| February | 92.0% | 85.7% | ▼ 6.8% |
| March | 94.6% | 93.3% | ▼ 1.3% |
| April | 80.0% | 90.0% | ▲ 12.5% |
| May | 87.1% | 80.4% | ▼ 7.7% |
| June | 89.7% | 77.4% | ▼ 13.7% |
| July | 90.3% | 78.2% | ▼ 13.4% |
| August | 93.6% | – | – |
| September | 90.0% | – | – |
| October | 90.3% | – | in progress |
| November | 86.7% | – | – |
| December | 87.2% | – | – |
| Year-to-date average (Jan–Jul) | 87.1% | 85.6% | ▼ 1.8% |
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 | 2 | 1 | ▼ 50.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 3 | 2 | ▼ 33.3% |
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 99.3% 828
- Cancelled 0.7% 6
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 |
|---|---|---|---|---|
| LAX IAH Los Angeles International Airport – George Bush Intercontinental Airport | 2,215 | 4.6 min | 88.2% | 658 |
| IAH LAX George Bush Intercontinental Airport – Los Angeles International Airport | 2,215 | 14.3 min | 78.2% | 176 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 47 | 47 | 93.6% | 0 |
| December 2024 | 57 | 57 | 79.0% | 0 |
| January 2025 | 57 | 55 | 76.4% | 2 |
| February 2025 | 50 | 50 | 92.0% | 0 |
| March 2025 | 37 | 37 | 94.6% | 0 |
| April 2025 | 30 | 30 | 80.0% | 0 |
| May 2025 | 31 | 31 | 87.1% | 0 |
| June 2025 | 30 | 29 | 89.7% | 1 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 31 | 31 | 93.6% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 30 | 30 | 86.7% | 0 |
| December 2025 | 40 | 39 | 87.2% | 1 |
| January 2026 | 34 | 33 | 93.9% | 1 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 31 | 30 | 93.3% | 1 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 51 | 51 | 80.4% | 0 |
| June 2026 | 53 | 53 | 77.4% | 0 |
| July 2026 | 55 | 55 | 78.2% | 0 |