WN2437
WN2437 (Southwest Airlines) is a multi-stop service on 25 routes, busiest Denver to Boston. Of 453 departures recorded from October 2024 to July 2026, 65.9% left on time, according to the US BTS.
- On-time departures65.9%of 453 flights
- Average delay21.7 min
- July 202614▼ 53.3%vs July 2025
- Cancelled0.4%
- Legs flown under this number25
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 | 6 | 31 | ▲ 416.7% |
| February | 10 | 28 | ▲ 180.0% |
| March | 21 | 31 | ▲ 47.6% |
| April | 28 | 27 | ▼ 3.6% |
| May | 31 | 27 | ▼ 12.9% |
| June | 30 | 14 | ▼ 53.3% |
| July | 30 | 14 | ▼ 53.3% |
| August | 4 | – | – |
| September | – | – | – |
| October | 22 | – | in progress |
| November | 27 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 156 | 172 | ▲ 10.3% |
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 | 80.0% | 80.0% | 0.0% |
| February | 70.0% | 67.9% | ▼ 3.1% |
| March | 71.4% | 51.6% | ▼ 27.7% |
| April | 67.9% | 85.2% | ▲ 25.5% |
| May | 80.7% | 70.4% | ▼ 12.7% |
| June | 63.3% | 64.3% | ▲ 1.5% |
| July | 50.0% | 50.0% | 0.0% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | 54.6% | – | in progress |
| November | 74.1% | – | – |
| December | 54.8% | – | – |
| Year-to-date average (Jan–Jul) | 69.0% | 67.0% | ▼ 2.9% |
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 | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
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 99.6% 451
- Cancelled 0.4% 2
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN BOS Denver International Airport – Boston Logan International Airport | 2,816 | 37.5 min | 55.6% | 81 |
| DEN BZN Denver International Airport – Bozeman Yellowstone International Airport | 844 | 18.4 min | 63.5% | 63 |
| OAK LAS Oakland San Francisco Bay Airport – Harry Reid International Airport | 654 | 8.9 min | 75.9% | 58 |
| MCI BNA Kansas City International Airport – Nashville International Airport | 790 | 11.3 min | 77.2% | 58 |
| HRL HOU Valley International Airport – William P. Hobby Airport | 446 | 13.0 min | 81.0% | 42 |
| BWI MCO Baltimore/Washington International Thurgood Marshall Airport – Orlando International Airport | 1,269 | 46.5 min | 48.5% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 65.0% | 0 |
| November 2024 | 7 | 7 | 71.4% | 0 |
| December 2024 | 14 | 14 | 50.0% | 0 |
| January 2025 | 6 | 5 | 80.0% | 1 |
| February 2025 | 10 | 10 | 70.0% | 0 |
| March 2025 | 21 | 21 | 71.4% | 0 |
| April 2025 | 28 | 28 | 67.9% | 0 |
| May 2025 | 31 | 31 | 80.7% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 30 | 30 | 50.0% | 0 |
| August 2025 | 4 | 4 | 50.0% | 0 |
| October 2025 | 22 | 22 | 54.6% | 0 |
| November 2025 | 27 | 27 | 74.1% | 0 |
| December 2025 | 31 | 31 | 54.8% | 0 |
| January 2026 | 31 | 30 | 80.0% | 1 |
| February 2026 | 28 | 28 | 67.9% | 0 |
| March 2026 | 31 | 31 | 51.6% | 0 |
| April 2026 | 27 | 27 | 85.2% | 0 |
| May 2026 | 27 | 27 | 70.4% | 0 |
| June 2026 | 14 | 14 | 64.3% | 0 |
| July 2026 | 14 | 14 | 50.0% | 0 |