DL2666
DL2666 (Delta Air Lines) flies Salt Lake City to St Louis. Of 622 departures recorded from October 2024 to July 2026, 78.4% left on time, according to the US BTS.
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 | 22 | 31 | ▲ 40.9% |
| April | 16 | 30 | ▲ 87.5% |
| May | 29 | 31 | ▲ 6.9% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 27 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 187 | 212 | ▲ 13.4% |
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 | 80.7% | 77.4% | ▼ 4.0% |
| February | 92.9% | 78.6% | ▼ 15.4% |
| March | 77.3% | 83.9% | ▲ 8.5% |
| April | 68.8% | 70.0% | ▲ 1.8% |
| May | 79.3% | 74.2% | ▼ 6.5% |
| June | 76.7% | 80.0% | ▲ 4.3% |
| July | 74.2% | 90.0% | ▲ 21.3% |
| August | 74.2% | – | – |
| September | 70.0% | – | – |
| October | 66.7% | – | in progress |
| November | 80.8% | – | – |
| December | 71.4% | – | – |
| Year-to-date average (Jan–Jul) | 78.5% | 79.1% | ▲ 0.8% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
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 99.7% 620
- Cancelled 0.3% 2
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 |
|---|---|---|---|---|
| SLC STL Salt Lake City International Airport – St. Louis Lambert International Airport | 1,856 | 9.8 min | 78.4% | 622 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 29 | 29 | 89.7% | 0 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 31 | 31 | 80.7% | 0 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 22 | 22 | 77.3% | 0 |
| April 2025 | 16 | 16 | 68.8% | 0 |
| May 2025 | 29 | 29 | 79.3% | 0 |
| June 2025 | 30 | 30 | 76.7% | 0 |
| July 2025 | 31 | 31 | 74.2% | 0 |
| August 2025 | 31 | 31 | 74.2% | 0 |
| September 2025 | 30 | 30 | 70.0% | 0 |
| October 2025 | 27 | 27 | 66.7% | 0 |
| November 2025 | 26 | 26 | 80.8% | 0 |
| December 2025 | 29 | 28 | 71.4% | 1 |
| January 2026 | 31 | 31 | 77.4% | 0 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 30 | 30 | 70.0% | 0 |
| May 2026 | 31 | 31 | 74.2% | 0 |
| June 2026 | 30 | 30 | 80.0% | 0 |
| July 2026 | 31 | 30 | 90.0% | 1 |