DL1529
DL1529 (Delta Air Lines) is a multi-stop service on 9 routes, busiest Houston to Detroit. Of 676 departures recorded from October 2024 to July 2026, 74.8% left on time, according to the US BTS.
- On-time departures74.8%of 676 flights
- Average delay19.9 min
- July 202657▲ 11.8%vs July 2025
- Cancelled1.5%
- Legs flown under this number9
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 | 8 | 26 | ▲ 225.0% |
| February | 9 | 17 | ▲ 88.9% |
| March | 24 | 49 | ▲ 104.2% |
| April | 28 | 38 | ▲ 35.7% |
| May | 19 | 30 | ▲ 57.9% |
| June | 46 | 51 | ▲ 10.9% |
| July | 51 | 57 | ▲ 11.8% |
| August | 49 | – | – |
| September | 44 | – | – |
| October | 27 | – | in progress |
| November | 19 | – | – |
| December | 26 | – | – |
| Year to date (Jan–Jul) | 185 | 268 | ▲ 44.9% |
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 | 88.9% | 62.5% | ▼ 29.7% |
| March | 83.3% | 60.4% | ▼ 27.5% |
| April | 96.4% | 73.7% | ▼ 23.6% |
| May | 73.7% | 72.4% | ▼ 1.7% |
| June | 64.4% | 62.8% | ▼ 2.6% |
| July | 75.5% | 72.7% | ▼ 3.7% |
| August | 79.6% | – | – |
| September | 84.1% | – | – |
| October | 92.6% | – | in progress |
| November | 84.2% | – | – |
| December | 68.0% | – | – |
| Year-to-date average (Jan–Jul) | 79.6% | 69.2% | ▼ 13.1% |
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 | 0 | 1 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 2 | 2 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 3 | 6 | ▲ 100.0% |
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 98.5% 666
- Cancelled 1.5% 10
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IAH DTW George Bush Intercontinental Airport – Detroit Metropolitan Wayne County Airport | 1,731 | 27.3 min | 74.6% | 327 |
| DTW IAH Detroit Metropolitan Wayne County Airport – George Bush Intercontinental Airport | 1,731 | 14.1 min | 74.2% | 250 |
| MSY JFK Louis Armstrong New Orleans International Airport – John F. Kennedy International Airport | 1,902 | 8.3 min | 76.7% | 31 |
| ATL CHA Hartsfield Jackson Atlanta International Airport – Chattanooga Metropolitan Airport (Lovell Field) | 171 | 7.4 min | 76.7% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 83.3% | 0 |
| November 2024 | 18 | 18 | 72.2% | 0 |
| December 2024 | 28 | 28 | 71.4% | 0 |
| January 2025 | 8 | 8 | 75.0% | 0 |
| February 2025 | 9 | 9 | 88.9% | 0 |
| March 2025 | 24 | 24 | 83.3% | 0 |
| April 2025 | 28 | 28 | 96.4% | 0 |
| May 2025 | 19 | 19 | 73.7% | 0 |
| June 2025 | 46 | 45 | 64.4% | 1 |
| July 2025 | 51 | 49 | 75.5% | 2 |
| August 2025 | 49 | 49 | 79.6% | 0 |
| September 2025 | 44 | 44 | 84.1% | 0 |
| October 2025 | 27 | 27 | 92.6% | 0 |
| November 2025 | 19 | 19 | 84.2% | 0 |
| December 2025 | 26 | 25 | 68.0% | 1 |
| January 2026 | 26 | 25 | 80.0% | 1 |
| February 2026 | 17 | 16 | 62.5% | 1 |
| March 2026 | 49 | 48 | 60.4% | 1 |
| April 2026 | 38 | 38 | 73.7% | 0 |
| May 2026 | 30 | 29 | 72.4% | 1 |
| June 2026 | 51 | 51 | 62.8% | 0 |
| July 2026 | 57 | 55 | 72.7% | 2 |