WN4099
WN4099 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Oklahoma City to Washington. Of 330 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 330 flights
- Average delay11.6 min
- July 202637▲ 37.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number20
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 7 | ▲ 133.3% |
| February | 10 | 23 | ▲ 130.0% |
| March | 28 | 2 | ▼ 92.9% |
| April | 7 | – | – |
| May | 1 | 2 | ▲ 100.0% |
| June | 22 | 31 | ▲ 40.9% |
| July | 27 | 37 | ▲ 37.0% |
| August | 3 | – | – |
| September | – | – | – |
| October | 25 | – | in progress |
| November | 28 | – | – |
| December | 38 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 57.1% | ▼ 42.9% |
| February | 70.0% | 54.6% | ▼ 22.1% |
| March | 96.4% | 100.0% | ▲ 3.7% |
| April | 100.0% | – | – |
| May | 100.0% | 50.0% | ▼ 50.0% |
| June | 86.4% | 93.6% | ▲ 8.3% |
| July | 88.5% | 91.9% | ▲ 3.9% |
| August | 33.3% | – | – |
| September | – | – | – |
| October | 52.0% | – | in progress |
| November | 78.6% | – | – |
| December | 65.8% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | – | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| 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 99.4% 328
- Cancelled 0.6% 2
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| OKC DCA OKC Will Rogers World Airport – Ronald Reagan Washington National Airport | 1,859 | 6.1 min | 90.5% | 43 |
| SMF PDX Sacramento International Airport – Portland International Airport | 771 | -2.1 min | 95.2% | 42 |
| PHX ONT Phoenix Sky Harbor International Airport – Ontario International Airport | 522 | 6.4 min | 78.6% | 42 |
| KOA HNL Ellison Onizuka Kona International Airport at Keāhole – Daniel K. Inouye International Airport | 263 | -5.0 min | 100.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 6 | 6 | 100.0% | 0 |
| December 2024 | 10 | 10 | 50.0% | 0 |
| January 2025 | 3 | 3 | 100.0% | 0 |
| February 2025 | 10 | 10 | 70.0% | 0 |
| March 2025 | 28 | 28 | 96.4% | 0 |
| April 2025 | 7 | 7 | 100.0% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 22 | 22 | 86.4% | 0 |
| July 2025 | 27 | 26 | 88.5% | 1 |
| August 2025 | 3 | 3 | 33.3% | 0 |
| October 2025 | 25 | 25 | 52.0% | 0 |
| November 2025 | 28 | 28 | 78.6% | 0 |
| December 2025 | 38 | 38 | 65.8% | 0 |
| January 2026 | 7 | 7 | 57.1% | 0 |
| February 2026 | 23 | 22 | 54.6% | 1 |
| March 2026 | 2 | 2 | 100.0% | 0 |
| May 2026 | 2 | 2 | 50.0% | 0 |
| June 2026 | 31 | 31 | 93.6% | 0 |
| July 2026 | 37 | 37 | 91.9% | 0 |