DL3121
DL3121 (Delta Air Lines) is a multi-stop service on 5 routes, busiest Atlanta to Nashville. Of 559 departures recorded from October 2024 to July 2026, 78.6% left on time, according to the US BTS.
- On-time departures78.6%of 559 flights
- Average delay12.6 min
- July 202631
- Cancelled2.9%
- Legs flown under this number5
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 | 31 | 31 | 0.0% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 20 | 31 | ▲ 55.0% |
| June | 4 | 30 | ▲ 650.0% |
| July | – | 31 | – |
| August | – | – | – |
| September | 2 | – | – |
| October | 38 | – | in progress |
| November | 38 | – | – |
| December | 46 | – | – |
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 | 82.8% | 89.3% | ▲ 7.9% |
| February | 82.1% | 81.5% | ▼ 0.8% |
| March | 83.3% | 86.2% | ▲ 3.5% |
| April | 69.0% | 93.3% | ▲ 35.3% |
| May | 80.0% | 75.0% | ▼ 6.3% |
| June | 75.0% | 86.7% | ▲ 15.6% |
| July | – | 50.0% | – |
| August | – | – | – |
| September | 100.0% | – | – |
| October | 89.5% | – | in progress |
| November | 71.1% | – | – |
| December | 63.6% | – | – |
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 | 2 | 3 | ▲ 50.0% |
| February | 0 | 1 | – |
| March | 1 | 2 | ▲ 100.0% |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 3 | – |
| June | 0 | 0 | – |
| July | – | 1 | – |
| August | – | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
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 97.1% 543
- Cancelled 2.9% 16
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATL BNA Hartsfield Jackson Atlanta International Airport – Nashville International Airport | 344 | 13.1 min | 79.9% | 447 |
| MSN DTW Dane County Regional Truax Field – Detroit Metropolitan Wayne County Airport | 500 | 9.0 min | 74.1% | 55 |
| DTW MSN Detroit Metropolitan Wayne County Airport – Dane County Regional Truax Field | 500 | 12.5 min | 72.2% | 55 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 84.2% | 0 |
| November 2024 | 29 | 29 | 89.7% | 0 |
| December 2024 | 31 | 31 | 67.7% | 0 |
| January 2025 | 31 | 29 | 82.8% | 2 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 31 | 30 | 83.3% | 1 |
| April 2025 | 30 | 29 | 69.0% | 1 |
| May 2025 | 20 | 20 | 80.0% | 0 |
| June 2025 | 4 | 4 | 75.0% | 0 |
| September 2025 | 2 | 2 | 100.0% | 0 |
| October 2025 | 38 | 38 | 89.5% | 0 |
| November 2025 | 38 | 38 | 71.1% | 0 |
| December 2025 | 46 | 44 | 63.6% | 2 |
| January 2026 | 31 | 28 | 89.3% | 3 |
| February 2026 | 28 | 27 | 81.5% | 1 |
| March 2026 | 31 | 29 | 86.2% | 2 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 28 | 75.0% | 3 |
| June 2026 | 30 | 30 | 86.7% | 0 |
| July 2026 | 31 | 30 | 50.0% | 1 |