DL556
DL556 (Delta Air Lines) is a multi-stop service on 8 routes, busiest Atlanta to Santa Ana. Of 488 departures recorded from October 2024 to July 2026, 79.1% left on time, according to the US BTS.
- On-time departures79.1%of 488 flights
- Average delay14.8 min
- July 202631▲ 34.8%vs July 2025
- Cancelled1.8%
- Legs flown under this number8
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 | 12 | 21 | ▲ 75.0% |
| February | 14 | 25 | ▲ 78.6% |
| March | 18 | 28 | ▲ 55.6% |
| April | 19 | 26 | ▲ 36.8% |
| May | 25 | 30 | ▲ 20.0% |
| June | 24 | 30 | ▲ 25.0% |
| July | 23 | 31 | ▲ 34.8% |
| August | 27 | – | – |
| September | 19 | – | – |
| October | 25 | – | in progress |
| November | 26 | – | – |
| December | 26 | – | – |
| Year to date (Jan–Jul) | 135 | 191 | ▲ 41.5% |
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 | 83.3% | 81.0% | ▼ 2.9% |
| February | 85.7% | 68.0% | ▼ 20.7% |
| March | 77.8% | 73.1% | ▼ 6.0% |
| April | 47.4% | 96.2% | ▲ 103.0% |
| May | 76.0% | 93.1% | ▲ 22.5% |
| June | 70.8% | 79.3% | ▲ 12.0% |
| July | 77.3% | 89.3% | ▲ 15.6% |
| August | 81.5% | – | – |
| September | 73.7% | – | – |
| October | 92.0% | – | in progress |
| November | 69.2% | – | – |
| December | 68.0% | – | – |
| Year-to-date average (Jan–Jul) | 74.0% | 82.8% | ▲ 11.9% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 1 | – |
| July | 1 | 3 | ▲ 200.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| 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 98.2% 479
- Cancelled 1.8% 9
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| ATL SNA Hartsfield Jackson Atlanta International Airport – John Wayne Orange County International Airport | 3,081 | 12.3 min | 75.6% | 327 |
| SNA JFK John Wayne Orange County International Airport – John F. Kennedy International Airport | 3,941 | 23.2 min | 87.7% | 86 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 90.0% | 0 |
| November 2024 | 15 | 15 | 93.3% | 0 |
| December 2024 | 14 | 14 | 78.6% | 0 |
| January 2025 | 12 | 12 | 83.3% | 0 |
| February 2025 | 14 | 14 | 85.7% | 0 |
| March 2025 | 18 | 18 | 77.8% | 0 |
| April 2025 | 19 | 19 | 47.4% | 0 |
| May 2025 | 25 | 25 | 76.0% | 0 |
| June 2025 | 24 | 24 | 70.8% | 0 |
| July 2025 | 23 | 22 | 77.3% | 1 |
| August 2025 | 27 | 27 | 81.5% | 0 |
| September 2025 | 19 | 19 | 73.7% | 0 |
| October 2025 | 25 | 25 | 92.0% | 0 |
| November 2025 | 26 | 26 | 69.2% | 0 |
| December 2025 | 26 | 25 | 68.0% | 1 |
| January 2026 | 21 | 21 | 81.0% | 0 |
| February 2026 | 25 | 25 | 68.0% | 0 |
| March 2026 | 28 | 26 | 73.1% | 2 |
| April 2026 | 26 | 26 | 96.2% | 0 |
| May 2026 | 30 | 29 | 93.1% | 1 |
| June 2026 | 30 | 29 | 79.3% | 1 |
| July 2026 | 31 | 28 | 89.3% | 3 |