DL2509
DL2509 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Chicago to Atlanta. Of 206 departures recorded from October 2024 to July 2026, 89.2% left on time, according to the US BTS.
- On-time departures89.2%of 206 flights
- Average delay6.1 min
- July 202631
- Cancelled1.0%
- Legs flown under this number3
Recorded departures by month
Short series — DL2509 has only 10 months so far. Enough to show the level now, not enough to read a trend.
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods7 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | 11 | 2 | ▼ 81.8% |
| May | 31 | 26 | ▼ 16.1% |
| June | 7 | 30 | ▲ 328.6% |
| July | – | 31 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Short series — DL2509 has only 10 months so far. Enough to show the level now, not enough to read a trend.
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 periods7 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | 81.8% | 100.0% | ▲ 22.2% |
| May | 83.9% | 92.3% | ▲ 10.1% |
| June | 100.0% | 93.3% | ▼ 6.7% |
| July | – | 82.8% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Short series — DL2509 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Short series — DL2509 has only 10 months so far. Enough to show the level now, not enough to read a trend.
Months without data are left blank.
The most recent periods7 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 2 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
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% 204
- Cancelled 1.0% 2
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD ATL Chicago O'Hare International Airport – Hartsfield Jackson Atlanta International Airport | 976 | 4.5 min | 88.9% | 117 |
| BNA BOS Nashville International Airport – Boston Logan International Airport | 1,514 | 8.6 min | 89.3% | 86 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 18 | 18 | 94.4% | 0 |
| April 2025 | 11 | 11 | 81.8% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 7 | 7 | 100.0% | 0 |
| April 2026 | 2 | 2 | 100.0% | 0 |
| May 2026 | 26 | 26 | 92.3% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 29 | 82.8% | 2 |