DL373
DL373 (Delta Air Lines) is a multi-stop service on 5 routes, busiest Las Vegas to Boston. Of 613 departures recorded from October 2024 to July 2026, 80.2% left on time, according to the US BTS.
- On-time departures80.2%of 613 flights
- Average delay9.9 min
- July 202624▼ 58.6%vs July 2025
- Cancelled1.3%
- Legs flown under this number5
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 | 22 | 22 | 0.0% |
| February | 26 | 22 | ▼ 15.4% |
| March | 30 | 30 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 29 | 21 | ▼ 27.6% |
| June | 53 | 1 | ▼ 98.1% |
| July | 58 | 24 | ▼ 58.6% |
| August | 26 | – | – |
| September | 24 | – | – |
| October | 36 | – | in progress |
| November | 28 | – | – |
| December | 27 | – | – |
| Year to date (Jan–Jul) | 248 | 150 | ▼ 39.5% |
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 | 63.6% | 100.0% | ▲ 57.1% |
| February | 69.2% | 95.0% | ▲ 37.2% |
| March | 100.0% | 93.3% | ▼ 6.7% |
| April | 90.0% | 80.0% | ▼ 11.1% |
| May | 75.9% | 80.0% | ▲ 5.5% |
| June | 60.4% | 100.0% | ▲ 65.6% |
| July | 80.4% | 60.9% | ▼ 24.3% |
| August | 84.6% | – | – |
| September | 70.8% | – | – |
| October | 63.9% | – | in progress |
| November | 82.1% | – | – |
| December | 85.2% | – | – |
| Year-to-date average (Jan–Jul) | 77.1% | 87.0% | ▲ 12.9% |
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 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 2 | 1 | ▼ 50.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 6 | ▲ 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 98.7% 605
- Cancelled 1.3% 8
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 30, 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 |
|---|---|---|---|---|
| LAS BOS Harry Reid International Airport – Boston Logan International Airport | 3,822 | 6.4 min | 85.4% | 416 |
| BOS LAS Boston Logan International Airport – Harry Reid International Airport | 3,822 | 16.7 min | 68.5% | 147 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 94.7% | 0 |
| November 2024 | 27 | 27 | 88.9% | 0 |
| December 2024 | 28 | 28 | 89.3% | 0 |
| January 2025 | 22 | 22 | 63.6% | 0 |
| February 2025 | 26 | 26 | 69.2% | 0 |
| March 2025 | 30 | 30 | 100.0% | 0 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 29 | 29 | 75.9% | 0 |
| June 2025 | 53 | 53 | 60.4% | 0 |
| July 2025 | 58 | 56 | 80.4% | 2 |
| August 2025 | 26 | 26 | 84.6% | 0 |
| September 2025 | 24 | 24 | 70.8% | 0 |
| October 2025 | 36 | 36 | 63.9% | 0 |
| November 2025 | 28 | 28 | 82.1% | 0 |
| December 2025 | 27 | 27 | 85.2% | 0 |
| January 2026 | 22 | 20 | 100.0% | 2 |
| February 2026 | 22 | 20 | 95.0% | 2 |
| March 2026 | 30 | 30 | 93.3% | 0 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 21 | 20 | 80.0% | 1 |
| June 2026 | 1 | 1 | 100.0% | 0 |
| July 2026 | 24 | 23 | 60.9% | 1 |