DL2570
DL2570 (Delta Air Lines) is a multi-stop service on 3 routes, busiest Boston to Chicago. Of 813 departures recorded from October 2024 to July 2026, 83.7% left on time, according to the US BTS.
- On-time departures83.7%of 813 flights
- Average delay8.5 min
- July 202660▲ 13.2%vs July 2025
- Cancelled2.0%
- Legs flown under this number3
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | 46 | 42 | ▼ 8.7% |
| April | 58 | 46 | ▼ 20.7% |
| May | 37 | 29 | ▼ 21.6% |
| June | 45 | 49 | ▲ 8.9% |
| July | 53 | 60 | ▲ 13.2% |
| August | 56 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 60 | – | – |
| December | 38 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | 89.1% | 88.6% | ▼ 0.6% |
| April | 75.9% | 87.0% | ▲ 14.6% |
| May | 91.7% | 100.0% | ▲ 9.1% |
| June | 84.4% | 87.2% | ▲ 3.3% |
| July | 76.5% | 95.0% | ▲ 24.2% |
| August | 80.4% | – | – |
| September | 83.1% | – | – |
| October | 69.4% | – | in progress |
| November | 74.1% | – | – |
| December | 81.6% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | 0 | 7 | – |
| April | 0 | 0 | – |
| May | 1 | 1 | 0.0% |
| June | 0 | 2 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| 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 98.0% 797
- Cancelled 2.0% 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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS ORD Boston Logan International Airport – Chicago O'Hare International Airport | 1,391 | 5.3 min | 87.9% | 466 |
| ORD BOS Chicago O'Hare International Airport – Boston Logan International Airport | 1,391 | 12.8 min | 77.9% | 345 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 32 | 32 | 93.8% | 0 |
| December 2024 | 20 | 20 | 75.0% | 0 |
| March 2025 | 46 | 46 | 89.1% | 0 |
| April 2025 | 58 | 58 | 75.9% | 0 |
| May 2025 | 37 | 36 | 91.7% | 1 |
| June 2025 | 45 | 45 | 84.4% | 0 |
| July 2025 | 53 | 51 | 76.5% | 2 |
| August 2025 | 56 | 56 | 80.4% | 0 |
| September 2025 | 60 | 59 | 83.1% | 1 |
| October 2025 | 62 | 62 | 69.4% | 0 |
| November 2025 | 60 | 58 | 74.1% | 2 |
| December 2025 | 38 | 38 | 81.6% | 0 |
| March 2026 | 42 | 35 | 88.6% | 7 |
| April 2026 | 46 | 46 | 87.0% | 0 |
| May 2026 | 29 | 28 | 100.0% | 1 |
| June 2026 | 49 | 47 | 87.2% | 2 |
| July 2026 | 60 | 60 | 95.0% | 0 |