DL1721
DL1721 (Delta Air Lines) is a multi-stop service on 7 routes, busiest Mobile to Atlanta. Of 524 departures recorded from October 2024 to July 2026, 90.6% left on time, according to the US BTS.
- On-time departures90.6%of 524 flights
- Average delay2.7 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.1%
- Legs flown under this number7
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 31 | ▲ 520.0% |
| February | – | 28 | – |
| March | 23 | 31 | ▲ 34.8% |
| April | 30 | 30 | 0.0% |
| May | 31 | 6 | ▼ 80.6% |
| June | 30 | 24 | ▼ 20.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 8 | – | – |
| December | 13 | – | – |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 92.9% | ▼ 7.1% |
| February | – | 88.5% | – |
| March | 69.6% | 90.3% | ▲ 29.8% |
| April | 83.3% | 93.1% | ▲ 11.7% |
| May | 80.7% | 100.0% | ▲ 24.0% |
| June | 85.7% | 91.7% | ▲ 7.0% |
| July | 96.8% | 100.0% | ▲ 3.3% |
| August | 93.6% | – | – |
| September | 96.7% | – | – |
| October | 96.8% | – | in progress |
| November | 100.0% | – | – |
| December | 61.5% | – | – |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 3 | – |
| February | – | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| May | 0 | 3 | – |
| June | 2 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| 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 97.9% 513
- Cancelled 2.1% 11
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MOB ATL Mobile Regional Airport – Hartsfield Jackson Atlanta International Airport | 486 | -1.1 min | 95.2% | 361 |
| ORD DTW Chicago O'Hare International Airport – Detroit Metropolitan Wayne County Airport | 376 | 17.1 min | 79.7% | 59 |
| SFO JFK San Francisco International Airport – John F. Kennedy International Airport | 4,152 | 5.3 min | 89.5% | 38 |
| SFO LAX San Francisco International Airport – Los Angeles International Airport | 543 | 10.3 min | 75.0% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 30 | 30 | 96.7% | 0 |
| January 2025 | 5 | 5 | 100.0% | 0 |
| March 2025 | 23 | 23 | 69.6% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 80.7% | 0 |
| June 2025 | 30 | 28 | 85.7% | 2 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 31 | 31 | 93.6% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 8 | 8 | 100.0% | 0 |
| December 2025 | 13 | 13 | 61.5% | 0 |
| January 2026 | 31 | 28 | 92.9% | 3 |
| February 2026 | 28 | 26 | 88.5% | 2 |
| March 2026 | 31 | 31 | 90.3% | 0 |
| April 2026 | 30 | 29 | 93.1% | 1 |
| May 2026 | 6 | 3 | 100.0% | 3 |
| June 2026 | 24 | 24 | 91.7% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |