DL540
DL540 (Delta Air Lines) is a multi-stop service on 14 routes, busiest San Diego to Atlanta. Of 697 departures recorded from October 2024 to July 2026, 82.0% left on time, according to the US BTS.
- On-time departures82.0%of 697 flights
- Average delay14.9 min
- July 202657▲ 90.0%vs July 2025
- Cancelled1.2%
- Legs flown under this number14
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 | 37 | 17 | ▼ 54.1% |
| February | 46 | 11 | ▼ 76.1% |
| March | 33 | 38 | ▲ 15.2% |
| April | 30 | 50 | ▲ 66.7% |
| May | 30 | 35 | ▲ 16.7% |
| June | 30 | 52 | ▲ 73.3% |
| July | 30 | 57 | ▲ 90.0% |
| August | 29 | – | – |
| September | 25 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 236 | 260 | ▲ 10.2% |
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 | 73.0% | 50.0% | ▼ 31.5% |
| February | 84.8% | 72.7% | ▼ 14.2% |
| March | 81.8% | 77.8% | ▼ 4.9% |
| April | 100.0% | 93.5% | ▼ 6.5% |
| May | 86.7% | 82.9% | ▼ 4.4% |
| June | 80.0% | 88.5% | ▲ 10.6% |
| July | 73.3% | 73.7% | ▲ 0.5% |
| August | 82.8% | – | – |
| September | 96.0% | – | – |
| October | 71.0% | – | in progress |
| November | 86.2% | – | – |
| December | 71.0% | – | – |
| Year-to-date average (Jan–Jul) | 82.8% | 77.0% | ▼ 7.0% |
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 | 0 | – |
| March | 0 | 2 | – |
| April | 1 | 4 | ▲ 300.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 7 | ▲ 600.0% |
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 98.9% 689
- Cancelled 1.1% 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
9Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 26 | 26 | 92.3% | 0 |
| November 2024 | 16 | 16 | 93.8% | 0 |
| December 2024 | 14 | 14 | 78.6% | 0 |
| January 2025 | 37 | 37 | 73.0% | 0 |
| February 2025 | 46 | 46 | 84.8% | 0 |
| March 2025 | 33 | 33 | 81.8% | 0 |
| April 2025 | 30 | 29 | 100.0% | 1 |
| May 2025 | 30 | 30 | 86.7% | 0 |
| June 2025 | 30 | 30 | 80.0% | 0 |
| July 2025 | 30 | 30 | 73.3% | 0 |
| August 2025 | 29 | 29 | 82.8% | 0 |
| September 2025 | 25 | 25 | 96.0% | 0 |
| October 2025 | 31 | 31 | 71.0% | 0 |
| November 2025 | 29 | 29 | 86.2% | 0 |
| December 2025 | 31 | 31 | 71.0% | 0 |
| January 2026 | 17 | 16 | 50.0% | 1 |
| February 2026 | 11 | 11 | 72.7% | 0 |
| March 2026 | 38 | 36 | 77.8% | 2 |
| April 2026 | 50 | 46 | 93.5% | 4 |
| May 2026 | 35 | 35 | 82.9% | 0 |
| June 2026 | 52 | 52 | 88.5% | 0 |
| July 2026 | 57 | 57 | 73.7% | 0 |