WN737
WN737 (Southwest Airlines) is a multi-stop service on 41 routes, busiest Miami to Denver. Of 704 departures recorded from October 2024 to July 2026, 71.7% left on time, according to the US BTS.
- On-time departures71.7%of 704 flights
- Average delay18.4 min
- July 202645▼ 21.1%vs July 2025
- Cancelled1.1%
- Legs flown under this number41
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
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 | 30 | 30 | 0.0% |
| February | 32 | 27 | ▼ 15.6% |
| March | 33 | 23 | ▼ 30.3% |
| April | 22 | 36 | ▲ 63.6% |
| May | 23 | 31 | ▲ 34.8% |
| June | 50 | 42 | ▼ 16.0% |
| July | 57 | 45 | ▼ 21.1% |
| August | 24 | – | – |
| September | 17 | – | – |
| October | 33 | – | in progress |
| November | 33 | – | – |
| December | 42 | – | – |
| Year to date (Jan–Jul) | 247 | 234 | ▼ 5.3% |
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 | 96.7% | 86.2% | ▼ 10.8% |
| February | 87.5% | 84.6% | ▼ 3.3% |
| March | 81.3% | 60.9% | ▼ 25.1% |
| April | 86.4% | 83.3% | ▼ 3.5% |
| May | 73.9% | 96.7% | ▲ 30.8% |
| June | 32.0% | 40.5% | ▲ 26.5% |
| July | 52.6% | 41.9% | ▼ 20.5% |
| August | 79.2% | – | – |
| September | 94.1% | – | – |
| October | 54.8% | – | in progress |
| November | 72.7% | – | – |
| December | 88.1% | – | – |
| Year-to-date average (Jan–Jul) | 72.9% | 70.6% | ▼ 3.2% |
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 | 0 | 1 | – |
| February | 0 | 1 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 5 | ▲ 400.0% |
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.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.9% 696
- Cancelled 1.1% 8
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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MIA DEN Miami International Airport – Denver International Airport | 2,749 | 3.0 min | 95.6% | 90 |
| MCO HOU Orlando International Airport – William P. Hobby Airport | 1,364 | -0.7 min | 93.0% | 58 |
| BOS DAL Boston Logan International Airport – Dallas Love Field | 2,497 | 46.6 min | 33.9% | 58 |
| MCO AUS Orlando International Airport – Austin Bergstrom International Airport | 1,596 | 14.7 min | 77.8% | 45 |
| HOU BHM William P. Hobby Airport – Birmingham-Shuttlesworth International Airport | 917 | 28.0 min | 57.1% | 42 |
| DEN BOS Denver International Airport – Boston Logan International Airport | 2,816 | 6.7 min | 90.0% | 42 |
| CLE BWI Cleveland Hopkins International Airport – Baltimore/Washington International Thurgood Marshall Airport | 505 | 6.9 min | 78.1% | 33 |
| BNA MCI Nashville International Airport – Kansas City International Airport | 790 | -0.4 min | 97.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 83.3% | 0 |
| November 2024 | 27 | 27 | 96.3% | 0 |
| December 2024 | 29 | 29 | 86.2% | 0 |
| January 2025 | 30 | 30 | 96.7% | 0 |
| February 2025 | 32 | 32 | 87.5% | 0 |
| March 2025 | 33 | 32 | 81.3% | 1 |
| April 2025 | 22 | 22 | 86.4% | 0 |
| May 2025 | 23 | 23 | 73.9% | 0 |
| June 2025 | 50 | 50 | 32.0% | 0 |
| July 2025 | 57 | 57 | 52.6% | 0 |
| August 2025 | 24 | 24 | 79.2% | 0 |
| September 2025 | 17 | 17 | 94.1% | 0 |
| October 2025 | 33 | 31 | 54.8% | 2 |
| November 2025 | 33 | 33 | 72.7% | 0 |
| December 2025 | 42 | 42 | 88.1% | 0 |
| January 2026 | 30 | 29 | 86.2% | 1 |
| February 2026 | 27 | 26 | 84.6% | 1 |
| March 2026 | 23 | 23 | 60.9% | 0 |
| April 2026 | 36 | 36 | 83.3% | 0 |
| May 2026 | 31 | 30 | 96.7% | 1 |
| June 2026 | 42 | 42 | 40.5% | 0 |
| July 2026 | 45 | 43 | 41.9% | 2 |