WN4398
WN4398 (Southwest Airlines) is a multi-stop service on 17 routes, busiest San Antonio to Denver. Of 419 departures recorded from October 2024 to July 2026, 83.1% left on time, according to the US BTS.
- On-time departures83.1%of 419 flights
- Average delay5.5 min
- July 202621
- Cancelled0.0%
- Legs flown under this number17
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 | 20 | 9 | ▼ 55.0% |
| February | 19 | 11 | ▼ 42.1% |
| March | 30 | 24 | ▼ 20.0% |
| April | 19 | 18 | ▼ 5.3% |
| May | 18 | 17 | ▼ 5.6% |
| June | 2 | 21 | ▲ 950.0% |
| July | – | 21 | – |
| August | 27 | – | – |
| September | 30 | – | – |
| October | 27 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
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 | 65.0% | 88.9% | ▲ 36.8% |
| February | 100.0% | 90.9% | ▼ 9.1% |
| March | 80.0% | 54.2% | ▼ 32.3% |
| April | 68.4% | 83.3% | ▲ 21.8% |
| May | 61.1% | 94.1% | ▲ 54.0% |
| June | 100.0% | 81.0% | ▼ 19.0% |
| July | – | 81.0% | – |
| August | 92.6% | – | – |
| September | 93.3% | – | – |
| October | 96.3% | – | in progress |
| November | 85.7% | – | – |
| December | 87.1% | – | – |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 100.0% 419
- Cancelled 0.0% 0
Share of all recorded flights in the period, all legs. · Oct 14, 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 |
|---|---|---|---|---|
| SAT DEN San Antonio International Airport – Denver International Airport | 1,280 | 4.6 min | 84.6% | 65 |
| SMF SNA Sacramento International Airport – John Wayne Orange County International Airport | 650 | 2.4 min | 85.9% | 64 |
| BWI RDU Baltimore/Washington International Thurgood Marshall Airport – Raleigh-Durham International Airport | 411 | 0.7 min | 93.7% | 63 |
| LAX MDW Los Angeles International Airport – Chicago Midway International Airport | 2,812 | 8.7 min | 80.5% | 41 |
| OAK BUR Oakland San Francisco Bay Airport – Hollywood Burbank/Bob Hope Airport | 523 | 12.8 min | 75.8% | 33 |
| BUR LAS Hollywood Burbank/Bob Hope Airport – Harry Reid International Airport | 359 | 15.9 min | 65.6% | 32 |
| SNA PHX John Wayne Orange County International Airport – Phoenix Sky Harbor International Airport | 544 | -1.6 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 78.6% | 0 |
| November 2024 | 12 | 12 | 75.0% | 0 |
| December 2024 | 21 | 21 | 95.2% | 0 |
| January 2025 | 20 | 20 | 65.0% | 0 |
| February 2025 | 19 | 19 | 100.0% | 0 |
| March 2025 | 30 | 30 | 80.0% | 0 |
| April 2025 | 19 | 19 | 68.4% | 0 |
| May 2025 | 18 | 18 | 61.1% | 0 |
| June 2025 | 2 | 2 | 100.0% | 0 |
| August 2025 | 27 | 27 | 92.6% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 27 | 27 | 96.3% | 0 |
| November 2025 | 28 | 28 | 85.7% | 0 |
| December 2025 | 31 | 31 | 87.1% | 0 |
| January 2026 | 9 | 9 | 88.9% | 0 |
| February 2026 | 11 | 11 | 90.9% | 0 |
| March 2026 | 24 | 24 | 54.2% | 0 |
| April 2026 | 18 | 18 | 83.3% | 0 |
| May 2026 | 17 | 17 | 94.1% | 0 |
| June 2026 | 21 | 21 | 81.0% | 0 |
| July 2026 | 21 | 21 | 81.0% | 0 |