DL2421
DL2421 (Delta Air Lines) is a multi-stop service on 10 routes, busiest Salt Lake City to St Louis. Of 479 departures recorded from October 2024 to July 2026, 87.8% left on time, according to the US BTS.
- On-time departures87.8%of 479 flights
- Average delay4.8 min
- July 20266▲ 200.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number10
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 27 | ▲ 440.0% |
| February | – | 11 | – |
| March | 23 | 42 | ▲ 82.6% |
| April | 22 | 36 | ▲ 63.6% |
| May | 24 | 45 | ▲ 87.5% |
| June | 6 | 16 | ▲ 166.7% |
| July | 2 | 6 | ▲ 200.0% |
| August | – | – | – |
| September | 13 | – | – |
| October | 28 | – | in progress |
| November | 30 | – | – |
| December | 18 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 84.6% | ▼ 15.4% |
| February | – | 90.9% | – |
| March | 81.8% | 88.1% | ▲ 7.7% |
| April | 81.8% | 94.4% | ▲ 15.4% |
| May | 83.3% | 90.9% | ▲ 9.1% |
| June | 100.0% | 100.0% | 0.0% |
| July | 100.0% | 25.0% | ▼ 75.0% |
| August | – | – | – |
| September | 76.9% | – | – |
| October | 85.7% | – | in progress |
| November | 80.0% | – | – |
| December | 77.8% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | – | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | – | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.0% 474
- Cancelled 1.0% 5
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 25, 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 |
|---|---|---|---|---|
| SLC STL Salt Lake City International Airport – St. Louis Lambert International Airport | 1,856 | 3.4 min | 87.6% | 205 |
| STL SLC St. Louis Lambert International Airport – Salt Lake City International Airport | 1,856 | -2.4 min | 94.6% | 92 |
| ATL CHA Hartsfield Jackson Atlanta International Airport – Chattanooga Metropolitan Airport (Lovell Field) | 171 | 12.0 min | 80.9% | 89 |
| MEM ATL Frederick W. Smith International Airport – Hartsfield Jackson Atlanta International Airport | 533 | -1.2 min | 90.3% | 31 |
| ATL MEM Hartsfield Jackson Atlanta International Airport – Frederick W. Smith International Airport | 533 | 3.3 min | 93.6% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 96.9% | 0 |
| November 2024 | 52 | 52 | 94.2% | 0 |
| December 2024 | 41 | 41 | 85.4% | 0 |
| January 2025 | 5 | 5 | 100.0% | 0 |
| March 2025 | 23 | 22 | 81.8% | 1 |
| April 2025 | 22 | 22 | 81.8% | 0 |
| May 2025 | 24 | 24 | 83.3% | 0 |
| June 2025 | 6 | 6 | 100.0% | 0 |
| July 2025 | 2 | 2 | 100.0% | 0 |
| September 2025 | 13 | 13 | 76.9% | 0 |
| October 2025 | 28 | 28 | 85.7% | 0 |
| November 2025 | 30 | 30 | 80.0% | 0 |
| December 2025 | 18 | 18 | 77.8% | 0 |
| January 2026 | 27 | 26 | 84.6% | 1 |
| February 2026 | 11 | 11 | 90.9% | 0 |
| March 2026 | 42 | 42 | 88.1% | 0 |
| April 2026 | 36 | 36 | 94.4% | 0 |
| May 2026 | 45 | 44 | 90.9% | 1 |
| June 2026 | 16 | 16 | 100.0% | 0 |
| July 2026 | 6 | 4 | 25.0% | 2 |