DL623
DL623 (Delta Air Lines) is a multi-stop service on 10 routes, busiest Salt Lake City to Kahului. Of 548 departures recorded from October 2024 to July 2026, 75.0% left on time, according to the US BTS.
- On-time departures75.0%of 548 flights
- Average delay16.8 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.4%
- Legs flown under this number10
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 | 31 | 14 | ▼ 54.8% |
| February | 28 | 13 | ▼ 53.6% |
| March | 31 | 4 | ▼ 87.1% |
| April | 30 | 20 | ▼ 33.3% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 27 | – | – |
| September | 27 | – | – |
| October | 27 | – | in progress |
| November | 24 | – | – |
| December | 16 | – | – |
| Year to date (Jan–Jul) | 212 | 143 | ▼ 32.5% |
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 | 90.3% | 91.7% | ▲ 1.5% |
| February | 71.4% | 100.0% | ▲ 40.0% |
| March | 90.3% | 50.0% | ▼ 44.6% |
| April | 76.7% | 80.0% | ▲ 4.3% |
| May | 77.4% | 78.6% | ▲ 1.5% |
| June | 58.6% | 76.7% | ▲ 30.8% |
| July | 70.0% | 79.3% | ▲ 13.3% |
| August | 59.3% | – | – |
| September | 70.4% | – | – |
| October | 63.0% | – | in progress |
| November | 45.5% | – | – |
| December | 33.3% | – | – |
| Year-to-date average (Jan–Jul) | 76.4% | 79.5% | ▲ 4.0% |
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 | 2 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 3 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 2 | 8 | ▲ 300.0% |
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 97.6% 535
- Cancelled 2.4% 13
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SLC OGG Salt Lake City International Airport – Kahului International Airport | 4,720 | 15.4 min | 81.9% | 265 |
| FLL LGA Fort Lauderdale Hollywood International Airport – LaGuardia Airport | 1,735 | 23.3 min | 56.3% | 115 |
| ATL SEA Hartsfield Jackson Atlanta International Airport – Seattle–Tacoma International Airport | 3,505 | 28.5 min | 62.1% | 60 |
| DEN ATL Denver International Airport – Hartsfield Jackson Atlanta International Airport | 1,927 | 9.2 min | 81.3% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 100.0% | 0 |
| November 2024 | 26 | 26 | 88.5% | 0 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 31 | 31 | 90.3% | 0 |
| February 2025 | 28 | 28 | 71.4% | 0 |
| March 2025 | 31 | 31 | 90.3% | 0 |
| April 2025 | 30 | 30 | 76.7% | 0 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 30 | 29 | 58.6% | 1 |
| July 2025 | 31 | 30 | 70.0% | 1 |
| August 2025 | 27 | 27 | 59.3% | 0 |
| September 2025 | 27 | 27 | 70.4% | 0 |
| October 2025 | 27 | 27 | 63.0% | 0 |
| November 2025 | 24 | 22 | 45.5% | 2 |
| December 2025 | 16 | 15 | 33.3% | 1 |
| January 2026 | 14 | 12 | 91.7% | 2 |
| February 2026 | 13 | 12 | 100.0% | 1 |
| March 2026 | 4 | 4 | 50.0% | 0 |
| April 2026 | 20 | 20 | 80.0% | 0 |
| May 2026 | 31 | 28 | 78.6% | 3 |
| June 2026 | 30 | 30 | 76.7% | 0 |
| July 2026 | 31 | 29 | 79.3% | 2 |