DL1237
DL1237 (Delta Air Lines) flies Sioux Falls to Atlanta. Of 658 departures recorded from October 2024 to July 2026, 88.5% left on time, according to the US BTS.
- On-time departures88.5%of 658 flights
- Average delay10.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.2%
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 212 | 212 | 0.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 79.3% | 93.6% | ▲ 18.0% |
| February | 64.3% | 85.7% | ▲ 33.3% |
| March | 93.6% | 86.7% | ▼ 7.4% |
| April | 89.7% | 96.7% | ▲ 7.8% |
| May | 93.6% | 96.8% | ▲ 3.4% |
| June | 92.9% | 86.7% | ▼ 6.7% |
| July | 93.6% | 93.6% | 0.0% |
| August | 96.8% | – | – |
| September | 96.7% | – | – |
| October | 90.3% | – | in progress |
| November | 89.7% | – | – |
| December | 76.7% | – | – |
| Year-to-date average (Jan–Jul) | 86.7% | 91.4% | ▲ 5.4% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 2 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 5 | 1 | ▼ 80.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 98.8% 650
- Cancelled 1.2% 8
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| FSD ATL Sioux Falls Regional Airport – Hartsfield Jackson Atlanta International Airport | 1,536 | 10.9 min | 88.5% | 658 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 80.0% | 0 |
| December 2024 | 31 | 31 | 77.4% | 0 |
| January 2025 | 31 | 29 | 79.3% | 2 |
| February 2025 | 28 | 28 | 64.3% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 30 | 29 | 89.7% | 1 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 28 | 92.9% | 2 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 31 | 31 | 96.8% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 30 | 29 | 89.7% | 1 |
| December 2025 | 31 | 30 | 76.7% | 1 |
| January 2026 | 31 | 31 | 93.6% | 0 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 31 | 30 | 86.7% | 1 |
| April 2026 | 30 | 30 | 96.7% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |