DL1391
DL1391 (Delta Air Lines) is a multi-stop service on 18 routes, busiest Philadelphia to Detroit. Of 803 departures recorded from October 2024 to July 2026, 74.3% left on time, according to the US BTS.
- On-time departures74.3%of 803 flights
- Average delay24.8 min
- July 202662▲ 148.0%vs July 2025
- Cancelled2.5%
- Legs flown under this number18
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 52 | 54 | ▲ 3.8% |
| February | 55 | 56 | ▲ 1.8% |
| March | 42 | 62 | ▲ 47.6% |
| April | 23 | 60 | ▲ 160.9% |
| May | 21 | 62 | ▲ 195.2% |
| June | 5 | 60 | ▲ 1,100.0% |
| July | 25 | 62 | ▲ 148.0% |
| August | 9 | – | – |
| September | 25 | – | – |
| October | 27 | – | in progress |
| November | 23 | – | – |
| December | 17 | – | – |
| Year to date (Jan–Jul) | 223 | 416 | ▲ 86.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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% | 84.6% | ▲ 12.8% |
| February | 80.0% | 80.8% | ▲ 1.0% |
| March | 73.8% | 77.1% | ▲ 4.4% |
| April | 73.9% | 76.7% | ▲ 3.7% |
| May | 52.4% | 69.4% | ▲ 32.4% |
| June | 20.0% | 64.4% | ▲ 222.0% |
| July | 68.0% | 48.3% | ▼ 28.9% |
| August | 66.7% | – | – |
| September | 70.8% | – | – |
| October | 88.0% | – | in progress |
| November | 95.5% | – | – |
| December | 93.3% | – | – |
| Year-to-date average (Jan–Jul) | 63.3% | 71.6% | ▲ 13.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 2 | ▼ 50.0% |
| February | 0 | 4 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 2 | – | in progress |
| November | 1 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 4 | 10 | ▲ 150.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 97.5% 783
- Cancelled 2.5% 20
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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHL DTW Philadelphia International Airport – Detroit Metropolitan Wayne County Airport | 728 | 34.5 min | 64.0% | 208 |
| DTW PHL Detroit Metropolitan Wayne County Airport – Philadelphia International Airport | 728 | 19.3 min | 78.3% | 208 |
| LGA RDU LaGuardia Airport – Raleigh-Durham International Airport | 693 | -1.0 min | 92.3% | 84 |
| ATL AGS Hartsfield Jackson Atlanta International Airport – Augusta Regional At Bush Field | 230 | 5.0 min | 88.1% | 61 |
| AGS ATL Augusta Regional At Bush Field – Hartsfield Jackson Atlanta International Airport | 230 | 20.3 min | 66.1% | 61 |
| PHX SLC Phoenix Sky Harbor International Airport – Salt Lake City International Airport | 818 | 7.3 min | 94.4% | 36 |
| ORD MSP Chicago O'Hare International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 537 | 73.4 min | 54.3% | 35 |
| DCA DTW Ronald Reagan Washington National Airport – Detroit Metropolitan Wayne County Airport | 651 | 14.2 min | 73.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 75.0% | 0 |
| November 2024 | 25 | 25 | 96.0% | 0 |
| December 2024 | 18 | 18 | 94.4% | 0 |
| January 2025 | 52 | 48 | 75.0% | 4 |
| February 2025 | 55 | 55 | 80.0% | 0 |
| March 2025 | 42 | 42 | 73.8% | 0 |
| April 2025 | 23 | 23 | 73.9% | 0 |
| May 2025 | 21 | 21 | 52.4% | 0 |
| June 2025 | 5 | 5 | 20.0% | 0 |
| July 2025 | 25 | 25 | 68.0% | 0 |
| August 2025 | 9 | 9 | 66.7% | 0 |
| September 2025 | 25 | 24 | 70.8% | 1 |
| October 2025 | 27 | 25 | 88.0% | 2 |
| November 2025 | 23 | 22 | 95.5% | 1 |
| December 2025 | 17 | 15 | 93.3% | 2 |
| January 2026 | 54 | 52 | 84.6% | 2 |
| February 2026 | 56 | 52 | 80.8% | 4 |
| March 2026 | 62 | 61 | 77.1% | 1 |
| April 2026 | 60 | 60 | 76.7% | 0 |
| May 2026 | 62 | 62 | 69.4% | 0 |
| June 2026 | 60 | 59 | 64.4% | 1 |
| July 2026 | 62 | 60 | 48.3% | 2 |