WN739
WN739 (Southwest Airlines) is a multi-stop service on 40 routes, busiest St Louis to Denver. Of 835 departures recorded from October 2024 to July 2026, 77.7% left on time, according to the US BTS.
- On-time departures77.7%of 835 flights
- Average delay10.8 min
- July 202648▼ 21.3%vs July 2025
- Cancelled0.7%
- Legs flown under this number40
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 | 31 | 32 | ▲ 3.2% |
| February | 28 | 27 | ▼ 3.6% |
| March | 31 | 19 | ▼ 38.7% |
| April | 27 | 33 | ▲ 22.2% |
| May | 27 | 40 | ▲ 48.1% |
| June | 47 | 45 | ▼ 4.3% |
| July | 61 | 48 | ▼ 21.3% |
| August | 48 | – | – |
| September | 51 | – | – |
| October | 35 | – | in progress |
| November | 54 | – | – |
| December | 70 | – | – |
| Year to date (Jan–Jul) | 252 | 244 | ▼ 3.2% |
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 | 86.7% | 90.6% | ▲ 4.6% |
| February | 92.9% | 88.9% | ▼ 4.3% |
| March | 83.9% | 84.2% | ▲ 0.4% |
| April | 74.1% | 66.7% | ▼ 10.0% |
| May | 81.5% | 52.5% | ▼ 35.6% |
| June | 85.1% | 77.8% | ▼ 8.6% |
| July | 83.6% | 62.5% | ▼ 25.2% |
| August | 70.8% | – | – |
| September | 65.3% | – | – |
| October | 77.1% | – | in progress |
| November | 73.6% | – | – |
| December | 75.7% | – | – |
| Year-to-date average (Jan–Jul) | 84.0% | 74.7% | ▼ 11.0% |
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 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 2 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 100.0% |
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 99.3% 829
- Cancelled 0.7% 6
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL DEN St. Louis Lambert International Airport – Denver International Airport | 1,236 | 4.3 min | 91.0% | 80 |
| AUS PHX Austin Bergstrom International Airport – Phoenix Sky Harbor International Airport | 1,401 | 10.7 min | 82.1% | 57 |
| BUR DEN Hollywood Burbank/Bob Hope Airport – Denver International Airport | 1,366 | 1.2 min | 94.1% | 51 |
| DEN PDX Denver International Airport – Portland International Airport | 1,592 | 10.8 min | 80.0% | 50 |
| BHM MCO Birmingham-Shuttlesworth International Airport – Orlando International Airport | 771 | 6.8 min | 77.8% | 45 |
| STL CMH St. Louis Lambert International Airport – John Glenn Columbus International Airport | 657 | 3.7 min | 88.4% | 43 |
| LAS SEA Harry Reid International Airport – Seattle–Tacoma International Airport | 1,395 | 13.5 min | 73.2% | 41 |
| DAL MSY Dallas Love Field – Louis Armstrong New Orleans International Airport | 700 | 8.2 min | 81.8% | 33 |
| MCI LAS Kansas City International Airport – Harry Reid International Airport | 1,829 | 16.8 min | 65.6% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 29 | 28 | 96.4% | 1 |
| December 2024 | 32 | 31 | 87.1% | 1 |
| January 2025 | 31 | 30 | 86.7% | 1 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 31 | 31 | 83.9% | 0 |
| April 2025 | 27 | 27 | 74.1% | 0 |
| May 2025 | 27 | 27 | 81.5% | 0 |
| June 2025 | 47 | 47 | 85.1% | 0 |
| July 2025 | 61 | 61 | 83.6% | 0 |
| August 2025 | 48 | 48 | 70.8% | 0 |
| September 2025 | 51 | 49 | 65.3% | 2 |
| October 2025 | 35 | 35 | 77.1% | 0 |
| November 2025 | 54 | 53 | 73.6% | 1 |
| December 2025 | 70 | 70 | 75.7% | 0 |
| January 2026 | 32 | 32 | 90.6% | 0 |
| February 2026 | 27 | 27 | 88.9% | 0 |
| March 2026 | 19 | 19 | 84.2% | 0 |
| April 2026 | 33 | 33 | 66.7% | 0 |
| May 2026 | 40 | 40 | 52.5% | 0 |
| June 2026 | 45 | 45 | 77.8% | 0 |
| July 2026 | 48 | 48 | 62.5% | 0 |