DL2639
DL2639 (Delta Air Lines) flies New York to Boston. Of 617 departures recorded from October 2024 to July 2026, 67.4% left on time, according to the US BTS.
- On-time departures67.4%of 617 flights
- Average delay31.7 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.6%
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 24 | 27 | ▲ 12.5% |
| February | 24 | 28 | ▲ 16.7% |
| March | 29 | 31 | ▲ 6.9% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 19 | – | – |
| Year to date (Jan–Jul) | 199 | 208 | ▲ 4.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 65.2% | 83.3% | ▲ 27.8% |
| February | 70.8% | 65.4% | ▼ 7.7% |
| March | 69.0% | 76.7% | ▲ 11.2% |
| April | 83.3% | 66.7% | ▼ 20.0% |
| May | 51.6% | 70.0% | ▲ 35.6% |
| June | 43.3% | 79.3% | ▲ 83.0% |
| July | 42.9% | 50.0% | ▲ 16.7% |
| August | 67.7% | – | – |
| September | 66.7% | – | – |
| October | 63.3% | – | in progress |
| November | 76.7% | – | – |
| December | 57.9% | – | – |
| Year-to-date average (Jan–Jul) | 60.9% | 70.2% | ▲ 15.3% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 3 | ▲ 200.0% |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 1 | – |
| July | 3 | 3 | 0.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 11 | ▲ 175.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 97.4% 601
- Cancelled 2.6% 16
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| JFK BOS John F. Kennedy International Airport – Boston Logan International Airport | 300 | 31.7 min | 67.4% | 617 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 29 | 29 | 89.7% | 0 |
| December 2024 | 20 | 20 | 65.0% | 0 |
| January 2025 | 24 | 23 | 65.2% | 1 |
| February 2025 | 24 | 24 | 70.8% | 0 |
| March 2025 | 29 | 29 | 69.0% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 51.6% | 0 |
| June 2025 | 30 | 30 | 43.3% | 0 |
| July 2025 | 31 | 28 | 42.9% | 3 |
| August 2025 | 31 | 31 | 67.7% | 0 |
| September 2025 | 30 | 30 | 66.7% | 0 |
| October 2025 | 31 | 30 | 63.3% | 1 |
| November 2025 | 30 | 30 | 76.7% | 0 |
| December 2025 | 19 | 19 | 57.9% | 0 |
| January 2026 | 27 | 24 | 83.3% | 3 |
| February 2026 | 28 | 26 | 65.4% | 2 |
| March 2026 | 31 | 30 | 76.7% | 1 |
| April 2026 | 30 | 30 | 66.7% | 0 |
| May 2026 | 31 | 30 | 70.0% | 1 |
| June 2026 | 30 | 29 | 79.3% | 1 |
| July 2026 | 31 | 28 | 50.0% | 3 |