DL403
DL403 (Delta Air Lines) is a multi-stop service on 13 routes, busiest Detroit to Los Angeles. Of 494 departures recorded from October 2024 to July 2026, 80.5% left on time, according to the US BTS.
- On-time departures80.5%of 494 flights
- Average delay12.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.6%
- Legs flown under this number13
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 | 17 | 35 | ▲ 105.9% |
| February | 2 | 28 | ▲ 1,300.0% |
| March | 19 | 11 | ▼ 42.1% |
| April | 26 | 18 | ▼ 30.8% |
| May | 27 | 30 | ▲ 11.1% |
| June | 29 | 30 | ▲ 3.4% |
| July | 31 | 31 | 0.0% |
| August | 20 | – | – |
| September | 29 | – | – |
| October | 5 | – | in progress |
| November | 18 | – | – |
| December | 21 | – | – |
| Year to date (Jan–Jul) | 151 | 183 | ▲ 21.2% |
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 | 82.4% | 48.5% | ▼ 41.1% |
| February | 50.0% | 70.4% | ▲ 40.7% |
| March | 94.7% | 90.9% | ▼ 4.0% |
| April | 92.3% | 83.3% | ▼ 9.7% |
| May | 100.0% | 86.7% | ▼ 13.3% |
| June | 86.2% | 82.8% | ▼ 4.0% |
| July | 87.1% | 85.7% | ▼ 1.6% |
| August | 65.0% | – | – |
| September | 93.1% | – | – |
| October | 60.0% | – | in progress |
| November | 77.8% | – | – |
| December | 90.0% | – | – |
| Year-to-date average (Jan–Jul) | 84.7% | 78.3% | ▼ 7.5% |
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 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 3 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 0 | 7 |
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 98.4% 486
- Cancelled 1.6% 8
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DTW LAX Detroit Metropolitan Wayne County Airport – Los Angeles International Airport | 3,178 | 6.8 min | 89.1% | 156 |
| JFK SNA John F. Kennedy International Airport – John Wayne Orange County International Airport | 3,941 | 8.5 min | 86.6% | 86 |
| JFK ATL John F. Kennedy International Airport – Hartsfield Jackson Atlanta International Airport | 1,222 | 25.1 min | 64.4% | 62 |
| LAX BOS Los Angeles International Airport – Boston Logan International Airport | 4,193 | 19.6 min | 70.7% | 41 |
| LAS JFK Harry Reid International Airport – John F. Kennedy International Airport | 3,609 | 19.9 min | 65.7% | 36 |
| JFK LAS John F. Kennedy International Airport – Harry Reid International Airport | 3,609 | 10.8 min | 82.9% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 63.6% | 0 |
| November 2024 | 17 | 17 | 70.6% | 0 |
| December 2024 | 39 | 39 | 69.2% | 0 |
| January 2025 | 17 | 17 | 82.4% | 0 |
| February 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 19 | 19 | 94.7% | 0 |
| April 2025 | 26 | 26 | 92.3% | 0 |
| May 2025 | 27 | 27 | 100.0% | 0 |
| June 2025 | 29 | 29 | 86.2% | 0 |
| July 2025 | 31 | 31 | 87.1% | 0 |
| August 2025 | 20 | 20 | 65.0% | 0 |
| September 2025 | 29 | 29 | 93.1% | 0 |
| October 2025 | 5 | 5 | 60.0% | 0 |
| November 2025 | 18 | 18 | 77.8% | 0 |
| December 2025 | 21 | 20 | 90.0% | 1 |
| January 2026 | 35 | 33 | 48.5% | 2 |
| February 2026 | 28 | 27 | 70.4% | 1 |
| March 2026 | 11 | 11 | 90.9% | 0 |
| April 2026 | 18 | 18 | 83.3% | 0 |
| May 2026 | 30 | 30 | 86.7% | 0 |
| June 2026 | 30 | 29 | 82.8% | 1 |
| July 2026 | 31 | 28 | 85.7% | 3 |