WN4338
WN4338 (Southwest Airlines) is a multi-stop service on 24 routes, busiest Denver to Burbank. Of 517 departures recorded from October 2024 to July 2026, 67.6% left on time, according to the US BTS.
- On-time departures67.6%of 517 flights
- Average delay15.4 min
- July 202641▲ 32.3%vs July 2025
- Cancelled2.1%
- Legs flown under this number24
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 | 26 | 39 | ▲ 50.0% |
| February | 32 | 60 | ▲ 87.5% |
| March | 13 | 24 | ▲ 84.6% |
| April | 5 | 28 | ▲ 460.0% |
| May | 4 | 30 | ▲ 650.0% |
| June | 27 | 38 | ▲ 40.7% |
| July | 31 | 41 | ▲ 32.3% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 1 | – | in progress |
| November | 8 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 138 | 260 | ▲ 88.4% |
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 | 80.8% | 80.0% | ▼ 1.0% |
| February | 62.5% | 69.0% | ▲ 10.4% |
| March | 61.5% | 69.6% | ▲ 13.0% |
| April | 80.0% | 85.7% | ▲ 7.1% |
| May | 100.0% | 100.0% | 0.0% |
| June | 44.4% | 29.0% | ▼ 34.9% |
| July | 50.0% | 53.7% | ▲ 7.3% |
| August | 74.1% | – | – |
| September | 80.8% | – | – |
| October | 100.0% | – | in progress |
| November | 87.5% | – | – |
| December | 27.3% | – | – |
| Year-to-date average (Jan–Jul) | 68.5% | 69.6% | ▲ 1.6% |
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 | 4 | – |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 3 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 7 | ▲ 133.3% |
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 97.9% 506
- Cancelled 2.1% 11
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN BUR Denver International Airport – Hollywood Burbank/Bob Hope Airport | 1,366 | 14.6 min | 68.9% | 75 |
| PWM MDW Portland International Jetport – Chicago Midway International Airport | 1,437 | 32.7 min | 48.3% | 61 |
| SMF LAS Sacramento International Airport – Harry Reid International Airport | 639 | 4.4 min | 94.7% | 57 |
| SMF ONT Sacramento International Airport – Ontario International Airport | 627 | 9.9 min | 78.0% | 50 |
| LAX DAL Los Angeles International Airport – Dallas Love Field | 2,002 | 6.6 min | 87.8% | 50 |
| SLC LAS Salt Lake City International Airport – Harry Reid International Airport | 592 | 22.3 min | 35.7% | 42 |
| LAS OMA Harry Reid International Airport – Eppley Airfield | 1,765 | 25.9 min | 44.1% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 91.7% | 0 |
| November 2024 | 19 | 18 | 88.9% | 1 |
| December 2024 | 15 | 15 | 60.0% | 0 |
| January 2025 | 26 | 26 | 80.8% | 0 |
| February 2025 | 32 | 32 | 62.5% | 0 |
| March 2025 | 13 | 13 | 61.5% | 0 |
| April 2025 | 5 | 5 | 80.0% | 0 |
| May 2025 | 4 | 4 | 100.0% | 0 |
| June 2025 | 27 | 27 | 44.4% | 0 |
| July 2025 | 31 | 28 | 50.0% | 3 |
| August 2025 | 27 | 27 | 74.1% | 0 |
| September 2025 | 26 | 26 | 80.8% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 8 | 8 | 87.5% | 0 |
| December 2025 | 11 | 11 | 27.3% | 0 |
| January 2026 | 39 | 35 | 80.0% | 4 |
| February 2026 | 60 | 58 | 69.0% | 2 |
| March 2026 | 24 | 23 | 69.6% | 1 |
| April 2026 | 28 | 28 | 85.7% | 0 |
| May 2026 | 30 | 30 | 100.0% | 0 |
| June 2026 | 38 | 38 | 29.0% | 0 |
| July 2026 | 41 | 41 | 53.7% | 0 |