DL543
DL543 (Delta Air Lines) is a multi-stop service on 12 routes, busiest Santa Ana to Atlanta. Of 584 departures recorded from October 2024 to July 2026, 83.1% left on time, according to the US BTS.
- On-time departures83.1%of 584 flights
- Average delay22.5 min
- July 20263▼ 87.0%vs July 2025
- Cancelled1.7%
- Legs flown under this number12
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 | 44 | 16 | ▼ 63.6% |
| February | 42 | 44 | ▲ 4.8% |
| March | 26 | 62 | ▲ 138.5% |
| April | 16 | 42 | ▲ 162.5% |
| May | 31 | 31 | 0.0% |
| June | 26 | 6 | ▼ 76.9% |
| July | 23 | 3 | ▼ 87.0% |
| August | 27 | – | – |
| September | 25 | – | – |
| October | 23 | – | in progress |
| November | 18 | – | – |
| December | 18 | – | – |
| Year to date (Jan–Jul) | 208 | 204 | ▼ 1.9% |
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 | 83.7% | 60.0% | ▼ 28.3% |
| February | 83.3% | 72.7% | ▼ 12.7% |
| March | 92.3% | 82.0% | ▼ 11.2% |
| April | 71.4% | 82.5% | ▲ 15.5% |
| May | 87.1% | 80.7% | ▼ 7.4% |
| June | 84.6% | 100.0% | ▲ 18.2% |
| July | 63.6% | 66.7% | ▲ 4.8% |
| August | 92.6% | – | – |
| September | 96.0% | – | – |
| October | 95.7% | – | in progress |
| November | 94.1% | – | – |
| December | 88.2% | – | – |
| Year-to-date average (Jan–Jul) | 80.9% | 77.8% | ▼ 3.8% |
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 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 2 | 2 | 0.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 4 | 4 | 0.0% |
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 98.3% 574
- Cancelled 1.7% 10
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SNA ATL John Wayne Orange County International Airport – Hartsfield Jackson Atlanta International Airport | 3,081 | 38.9 min | 87.8% | 227 |
| ATL SNA Hartsfield Jackson Atlanta International Airport – John Wayne Orange County International Airport | 3,081 | 19.2 min | 82.5% | 104 |
| STL ATL St. Louis Lambert International Airport – Hartsfield Jackson Atlanta International Airport | 779 | 7.9 min | 76.5% | 84 |
| ATL STL Hartsfield Jackson Atlanta International Airport – St. Louis Lambert International Airport | 779 | 9.1 min | 80.6% | 37 |
| LAS ATL Harry Reid International Airport – Hartsfield Jackson Atlanta International Airport | 2,805 | 13.5 min | 80.7% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 19 | 19 | 84.2% | 0 |
| December 2024 | 22 | 22 | 72.7% | 0 |
| January 2025 | 44 | 43 | 83.7% | 1 |
| February 2025 | 42 | 42 | 83.3% | 0 |
| March 2025 | 26 | 26 | 92.3% | 0 |
| April 2025 | 16 | 14 | 71.4% | 2 |
| May 2025 | 31 | 31 | 87.1% | 0 |
| June 2025 | 26 | 26 | 84.6% | 0 |
| July 2025 | 23 | 22 | 63.6% | 1 |
| August 2025 | 27 | 27 | 92.6% | 0 |
| September 2025 | 25 | 25 | 96.0% | 0 |
| October 2025 | 23 | 23 | 95.7% | 0 |
| November 2025 | 18 | 17 | 94.1% | 1 |
| December 2025 | 18 | 17 | 88.2% | 1 |
| January 2026 | 16 | 15 | 60.0% | 1 |
| February 2026 | 44 | 44 | 72.7% | 0 |
| March 2026 | 62 | 61 | 82.0% | 1 |
| April 2026 | 42 | 40 | 82.5% | 2 |
| May 2026 | 31 | 31 | 80.7% | 0 |
| June 2026 | 6 | 6 | 100.0% | 0 |
| July 2026 | 3 | 3 | 66.7% | 0 |