DL1135
DL1135 (Delta Air Lines) is a multi-stop service on 2 routes, busiest Detroit to Phoenix. Of 648 departures recorded from October 2024 to July 2026, 69.1% left on time, according to the US BTS.
- On-time departures69.1%of 648 flights
- Average delay23.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.6%
- 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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 24 | ▼ 20.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 212 | 206 | ▼ 2.8% |
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 | 53.3% | 51.6% | ▼ 3.2% |
| February | 60.7% | 46.4% | ▼ 23.5% |
| March | 61.3% | 76.7% | ▲ 25.1% |
| April | 73.3% | 80.0% | ▲ 9.1% |
| May | 83.9% | 77.4% | ▼ 7.7% |
| June | 56.7% | 91.7% | ▲ 61.8% |
| July | 67.7% | 53.3% | ▼ 21.3% |
| August | 67.7% | – | – |
| September | 83.3% | – | – |
| October | 60.0% | – | in progress |
| November | 75.0% | – | – |
| December | 56.7% | – | – |
| Year-to-date average (Jan–Jul) | 65.3% | 68.2% | ▲ 4.4% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 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 99.4% 644
- Cancelled 0.6% 4
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 |
|---|---|---|---|---|
| DTW PHX Detroit Metropolitan Wayne County Airport – Phoenix Sky Harbor International Airport | 2,683 | 19.9 min | 68.6% | 520 |
| EWR SLC Newark Liberty International Airport – Salt Lake City International Airport | 3,160 | 36.6 min | 71.1% | 128 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 29 | 29 | 86.2% | 0 |
| December 2024 | 31 | 31 | 80.7% | 0 |
| January 2025 | 31 | 30 | 53.3% | 1 |
| February 2025 | 28 | 28 | 60.7% | 0 |
| March 2025 | 31 | 31 | 61.3% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 30 | 30 | 56.7% | 0 |
| July 2025 | 31 | 31 | 67.7% | 0 |
| August 2025 | 31 | 31 | 67.7% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 30 | 30 | 60.0% | 0 |
| November 2025 | 28 | 28 | 75.0% | 0 |
| December 2025 | 31 | 30 | 56.7% | 1 |
| January 2026 | 31 | 31 | 51.6% | 0 |
| February 2026 | 28 | 28 | 46.4% | 0 |
| March 2026 | 31 | 30 | 76.7% | 1 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 31 | 31 | 77.4% | 0 |
| June 2026 | 24 | 24 | 91.7% | 0 |
| July 2026 | 31 | 30 | 53.3% | 1 |