DL1156
DL1156 (Delta Air Lines) is a multi-stop service on 9 routes, busiest Austin to Boston. Of 608 departures recorded from October 2024 to July 2026, 65.5% left on time, according to the US BTS.
- On-time departures65.5%of 608 flights
- Average delay33.0 min
- July 202631▲ 3.3%vs July 2025
- Cancelled1.0%
- Legs flown under this number9
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 25 | 28 | ▲ 12.0% |
| February | 16 | 29 | ▲ 81.3% |
| March | 27 | 32 | ▲ 18.5% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 30 | 31 | ▲ 3.3% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 28 | – | in progress |
| November | 27 | – | – |
| December | 25 | – | – |
| Year to date (Jan–Jul) | 189 | 211 | ▲ 11.6% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 76.0% | 65.4% | ▼ 14.0% |
| February | 75.0% | 69.0% | ▼ 8.0% |
| March | 85.2% | 71.0% | ▼ 16.7% |
| April | 63.3% | 50.0% | ▼ 21.0% |
| May | 58.1% | 64.5% | ▲ 11.1% |
| June | 63.3% | 80.0% | ▲ 26.3% |
| July | 58.6% | 58.1% | ▼ 1.0% |
| August | 64.5% | – | – |
| September | 23.3% | – | – |
| October | 53.6% | – | in progress |
| November | 65.4% | – | – |
| December | 68.0% | – | – |
| Year-to-date average (Jan–Jul) | 68.5% | 65.4% | ▼ 4.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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 99.0% 602
- Cancelled 1.0% 6
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| AUS BOS Austin Bergstrom International Airport – Boston Logan International Airport | 2,729 | 40.2 min | 61.1% | 450 |
| ATL CHA Hartsfield Jackson Atlanta International Airport – Chattanooga Metropolitan Airport (Lovell Field) | 171 | 6.0 min | 86.1% | 43 |
| IAH ATL George Bush Intercontinental Airport – Hartsfield Jackson Atlanta International Airport | 1,108 | 2.4 min | 94.3% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 8 | 8 | 100.0% | 0 |
| November 2024 | 19 | 19 | 100.0% | 0 |
| December 2024 | 40 | 39 | 71.8% | 1 |
| January 2025 | 25 | 25 | 76.0% | 0 |
| February 2025 | 16 | 16 | 75.0% | 0 |
| March 2025 | 27 | 27 | 85.2% | 0 |
| April 2025 | 30 | 30 | 63.3% | 0 |
| May 2025 | 31 | 31 | 58.1% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 30 | 29 | 58.6% | 1 |
| August 2025 | 31 | 31 | 64.5% | 0 |
| September 2025 | 30 | 30 | 23.3% | 0 |
| October 2025 | 28 | 28 | 53.6% | 0 |
| November 2025 | 27 | 26 | 65.4% | 1 |
| December 2025 | 25 | 25 | 68.0% | 0 |
| January 2026 | 28 | 26 | 65.4% | 2 |
| February 2026 | 29 | 29 | 69.0% | 0 |
| March 2026 | 32 | 31 | 71.0% | 1 |
| April 2026 | 30 | 30 | 50.0% | 0 |
| May 2026 | 31 | 31 | 64.5% | 0 |
| June 2026 | 30 | 30 | 80.0% | 0 |
| July 2026 | 31 | 31 | 58.1% | 0 |