WN4291
WN4291 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Phoenix to Dulles. Of 498 departures recorded from October 2024 to July 2026, 79.9% left on time, according to the US BTS.
- On-time departures79.9%of 498 flights
- Average delay10.6 min
- July 202630▲ 76.5%vs July 2025
- Cancelled1.2%
- Legs flown under this number16
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 | 27 | 41 | ▲ 51.9% |
| February | 28 | 34 | ▲ 21.4% |
| March | 5 | 32 | ▲ 540.0% |
| April | 3 | 27 | ▲ 800.0% |
| May | 4 | 26 | ▲ 550.0% |
| June | 17 | 30 | ▲ 76.5% |
| July | 17 | 30 | ▲ 76.5% |
| August | 26 | – | – |
| September | 26 | – | – |
| October | 1 | – | in progress |
| November | 51 | – | – |
| December | 33 | – | – |
| Year to date (Jan–Jul) | 101 | 220 | ▲ 117.8% |
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 | 88.9% | 87.8% | ▼ 1.2% |
| February | 75.0% | 94.1% | ▲ 25.5% |
| March | 80.0% | 71.0% | ▼ 11.3% |
| April | 66.7% | 92.6% | ▲ 38.9% |
| May | 25.0% | 100.0% | ▲ 300.0% |
| June | 47.1% | 76.7% | ▲ 62.9% |
| July | 70.6% | 70.0% | ▼ 0.8% |
| August | 88.5% | – | – |
| September | 92.3% | – | – |
| October | 100.0% | – | in progress |
| November | 75.5% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 64.7% | 84.6% | ▲ 30.7% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
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 98.8% 492
- Cancelled 1.2% 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 |
|---|---|---|---|---|
| PHX IAD Phoenix Sky Harbor International Airport – Washington Dulles International Airport | 3,141 | 10.5 min | 79.1% | 86 |
| DAL BOS Dallas Love Field – Boston Logan International Airport | 2,497 | 18.1 min | 71.9% | 57 |
| DEN RNO Denver International Airport – Reno Tahoe International Airport | 1,291 | 0.1 min | 90.9% | 55 |
| SLC DEN Salt Lake City International Airport – Denver International Airport | 628 | -1.3 min | 96.0% | 50 |
| SJC LAX Mineta San Jose International Airport – Los Angeles International Airport | 496 | 0.8 min | 94.0% | 50 |
| TPA SDF Tampa International Airport – Louisville Muhammad Ali International Airport | 1,172 | 10.0 min | 77.8% | 36 |
| PHX SEA Phoenix Sky Harbor International Airport – Seattle–Tacoma International Airport | 1,782 | 19.3 min | 58.3% | 36 |
| MDW LGA Chicago Midway International Airport – LaGuardia Airport | 1,164 | 27.1 min | 67.7% | 36 |
| PIT MCO Pittsburgh International Airport – Orlando International Airport | 1,345 | 15.3 min | 71.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 9 | 88.9% | 3 |
| November 2024 | 11 | 11 | 72.7% | 0 |
| December 2024 | 17 | 17 | 76.5% | 0 |
| January 2025 | 27 | 27 | 88.9% | 0 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 5 | 5 | 80.0% | 0 |
| April 2025 | 3 | 3 | 66.7% | 0 |
| May 2025 | 4 | 4 | 25.0% | 0 |
| June 2025 | 17 | 17 | 47.1% | 0 |
| July 2025 | 17 | 17 | 70.6% | 0 |
| August 2025 | 26 | 26 | 88.5% | 0 |
| September 2025 | 26 | 26 | 92.3% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 51 | 49 | 75.5% | 2 |
| December 2025 | 33 | 33 | 66.7% | 0 |
| January 2026 | 41 | 41 | 87.8% | 0 |
| February 2026 | 34 | 34 | 94.1% | 0 |
| March 2026 | 32 | 31 | 71.0% | 1 |
| April 2026 | 27 | 27 | 92.6% | 0 |
| May 2026 | 26 | 26 | 100.0% | 0 |
| June 2026 | 30 | 30 | 76.7% | 0 |
| July 2026 | 30 | 30 | 70.0% | 0 |