WN839
WN839 (Southwest Airlines) is a multi-stop service on 49 routes, busiest Phoenix to Milwaukee. Of 781 departures recorded from October 2024 to July 2026, 78.6% left on time, according to the US BTS.
- On-time departures78.6%of 781 flights
- Average delay7.8 min
- July 202631▲ 82.4%vs July 2025
- Cancelled0.8%
- Legs flown under this number49
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 | 32 | 34 | ▲ 6.3% |
| February | 20 | 13 | ▼ 35.0% |
| March | 24 | 47 | ▲ 95.8% |
| April | 35 | 30 | ▼ 14.3% |
| May | 39 | 27 | ▼ 30.8% |
| June | 21 | 30 | ▲ 42.9% |
| July | 17 | 31 | ▲ 82.4% |
| August | 70 | – | – |
| September | 74 | – | – |
| October | 31 | – | in progress |
| November | 40 | – | – |
| December | 53 | – | – |
| Year to date (Jan–Jul) | 188 | 212 | ▲ 12.8% |
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 | 81.3% | 69.7% | ▼ 14.2% |
| February | 85.0% | 83.3% | ▼ 2.0% |
| March | 75.0% | 95.7% | ▲ 27.7% |
| April | 76.5% | 76.7% | ▲ 0.3% |
| May | 81.6% | 81.5% | ▼ 0.1% |
| June | 81.0% | 70.0% | ▼ 13.5% |
| July | 86.7% | 61.3% | ▼ 29.3% |
| August | 72.9% | – | – |
| September | 78.4% | – | – |
| October | 71.0% | – | in progress |
| November | 75.0% | – | – |
| December | 90.6% | – | – |
| Year-to-date average (Jan–Jul) | 81.0% | 76.9% | ▼ 5.1% |
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 | 1 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 2 | ▼ 50.0% |
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 99.2% 775
- Cancelled 0.8% 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX MKE Phoenix Sky Harbor International Airport – General Mitchell International Airport | 2,346 | 4.4 min | 82.4% | 68 |
| BUR PHX Hollywood Burbank/Bob Hope Airport – Phoenix Sky Harbor International Airport | 593 | 13.2 min | 66.7% | 57 |
| SNA DEN John Wayne Orange County International Airport – Denver International Airport | 1,360 | 8.8 min | 74.0% | 50 |
| PIT BNA Pittsburgh International Airport – Nashville International Airport | 743 | 7.6 min | 73.8% | 42 |
| BWI RDU Baltimore/Washington International Thurgood Marshall Airport – Raleigh-Durham International Airport | 411 | 9.3 min | 78.1% | 41 |
| SNA PHX John Wayne Orange County International Airport – Phoenix Sky Harbor International Airport | 544 | 3.9 min | 79.4% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 32 | 32 | 84.4% | 0 |
| November 2024 | 43 | 43 | 90.7% | 0 |
| December 2024 | 38 | 38 | 60.5% | 0 |
| January 2025 | 32 | 32 | 81.3% | 0 |
| February 2025 | 20 | 20 | 85.0% | 0 |
| March 2025 | 24 | 24 | 75.0% | 0 |
| April 2025 | 35 | 34 | 76.5% | 1 |
| May 2025 | 39 | 38 | 81.6% | 1 |
| June 2025 | 21 | 21 | 81.0% | 0 |
| July 2025 | 17 | 15 | 86.7% | 2 |
| August 2025 | 70 | 70 | 72.9% | 0 |
| September 2025 | 74 | 74 | 78.4% | 0 |
| October 2025 | 31 | 31 | 71.0% | 0 |
| November 2025 | 40 | 40 | 75.0% | 0 |
| December 2025 | 53 | 53 | 90.6% | 0 |
| January 2026 | 34 | 33 | 69.7% | 1 |
| February 2026 | 13 | 12 | 83.3% | 1 |
| March 2026 | 47 | 47 | 95.7% | 0 |
| April 2026 | 30 | 30 | 76.7% | 0 |
| May 2026 | 27 | 27 | 81.5% | 0 |
| June 2026 | 30 | 30 | 70.0% | 0 |
| July 2026 | 31 | 31 | 61.3% | 0 |