DL1728
DL1728 (Delta Air Lines) is a multi-stop service on 11 routes, busiest Boston to Los Angeles. Of 621 departures recorded from October 2024 to July 2026, 82.6% left on time, according to the US BTS.
- On-time departures82.6%of 621 flights
- Average delay11.9 min
- July 202648▲ 60.0%vs July 2025
- Cancelled1.9%
- Legs flown under this number11
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 | 12 | ▲ 140.0% |
| February | – | 21 | – |
| March | 23 | 28 | ▲ 21.7% |
| April | 13 | 46 | ▲ 253.8% |
| May | 25 | 62 | ▲ 148.0% |
| June | 30 | 48 | ▲ 60.0% |
| July | 30 | 48 | ▲ 60.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
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% | 100.0% | 0.0% |
| February | – | 71.4% | – |
| March | 54.6% | 76.9% | ▲ 41.0% |
| April | 83.3% | 87.0% | ▲ 4.4% |
| May | 92.0% | 72.6% | ▼ 21.1% |
| June | 83.3% | 75.0% | ▼ 10.0% |
| July | 90.0% | 68.2% | ▼ 24.2% |
| August | 93.6% | – | – |
| September | 90.0% | – | – |
| October | 86.2% | – | in progress |
| November | 89.3% | – | – |
| December | 86.2% | – | – |
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 | 0 | – |
| February | – | 0 | – |
| March | 1 | 2 | ▲ 100.0% |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 4 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 1 | – | – |
| 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 98.1% 609
- Cancelled 1.9% 12
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
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS LAX Boston Logan International Airport – Los Angeles International Airport | 4,193 | 8.3 min | 88.3% | 224 |
| MDW ATL Chicago Midway International Airport – Hartsfield Jackson Atlanta International Airport | 952 | 27.6 min | 67.4% | 97 |
| ATL MDW Hartsfield Jackson Atlanta International Airport – Chicago Midway International Airport | 952 | 8.8 min | 83.2% | 97 |
| RSW MSP Southwest Florida International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 2,282 | 36.5 min | 64.7% | 36 |
| BNA ATL Nashville International Airport – Hartsfield Jackson Atlanta International Airport | 344 | 0.1 min | 86.1% | 36 |
| ATL TPA Hartsfield Jackson Atlanta International Airport – Tampa International Airport | 655 | 11.8 min | 80.0% | 31 |
| IDA SLC Idaho Falls Regional Airport – Salt Lake City International Airport | 303 | 1.9 min | 93.3% | 30 |
| GSO ATL Piedmont Triad International Airport – Hartsfield Jackson Atlanta International Airport | 493 | -3.8 min | 100.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 28 | 28 | 85.7% | 0 |
| December 2024 | 31 | 31 | 93.6% | 0 |
| January 2025 | 5 | 5 | 100.0% | 0 |
| March 2025 | 23 | 22 | 54.6% | 1 |
| April 2025 | 13 | 12 | 83.3% | 1 |
| May 2025 | 25 | 25 | 92.0% | 0 |
| June 2025 | 30 | 30 | 83.3% | 0 |
| July 2025 | 30 | 30 | 90.0% | 0 |
| August 2025 | 31 | 31 | 93.6% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 30 | 29 | 86.2% | 1 |
| November 2025 | 29 | 28 | 89.3% | 1 |
| December 2025 | 31 | 29 | 86.2% | 2 |
| January 2026 | 12 | 12 | 100.0% | 0 |
| February 2026 | 21 | 21 | 71.4% | 0 |
| March 2026 | 28 | 26 | 76.9% | 2 |
| April 2026 | 46 | 46 | 87.0% | 0 |
| May 2026 | 62 | 62 | 72.6% | 0 |
| June 2026 | 48 | 48 | 75.0% | 0 |
| July 2026 | 48 | 44 | 68.2% | 4 |