WN3839
WN3839 (Southwest Airlines) is a multi-stop service on 25 routes, busiest San Francisco to Phoenix. Of 446 departures recorded from October 2024 to July 2026, 65.0% left on time, according to the US BTS.
- On-time departures65.0%of 446 flights
- Average delay17.2 min
- July 202619▲ 375.0%vs July 2025
- Cancelled0.7%
- Legs flown under this number25
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 | 28 | 4 | ▼ 85.7% |
| February | 24 | – | – |
| March | 22 | 27 | ▲ 22.7% |
| April | 25 | 20 | ▼ 20.0% |
| May | 26 | 18 | ▼ 30.8% |
| June | 8 | 21 | ▲ 162.5% |
| July | 4 | 19 | ▲ 375.0% |
| August | 15 | – | – |
| September | 17 | – | – |
| October | 50 | – | in progress |
| November | 16 | – | – |
| December | 27 | – | – |
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 | 60.7% | 75.0% | ▲ 23.5% |
| February | 50.0% | – | – |
| March | 68.2% | 85.2% | ▲ 24.9% |
| April | 72.0% | 70.0% | ▼ 2.8% |
| May | 80.8% | 27.8% | ▼ 65.6% |
| June | 50.0% | 42.9% | ▼ 14.3% |
| July | 25.0% | 52.9% | ▲ 111.8% |
| August | 40.0% | – | – |
| September | 41.2% | – | – |
| October | 70.0% | – | in progress |
| November | 81.3% | – | – |
| December | 69.2% | – | – |
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 | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
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 99.3% 443
- Cancelled 0.7% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO PHX San Francisco International Airport – Phoenix Sky Harbor International Airport | 1,047 | 25.0 min | 63.8% | 105 |
| SJC BUR Mineta San Jose International Airport – Hollywood Burbank/Bob Hope Airport | 477 | 11.1 min | 76.0% | 50 |
| PHX OAK Phoenix Sky Harbor International Airport – Oakland San Francisco Bay Airport | 1,039 | 21.1 min | 41.2% | 34 |
| MCO CMH Orlando International Airport – John Glenn Columbus International Airport | 1,295 | 8.8 min | 84.9% | 33 |
| OAK DAL Oakland San Francisco Bay Airport – Dallas Love Field | 2,358 | 36.7 min | 38.7% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 100.0% | 0 |
| November 2024 | 27 | 27 | 74.1% | 0 |
| December 2024 | 29 | 29 | 65.5% | 0 |
| January 2025 | 28 | 28 | 60.7% | 0 |
| February 2025 | 24 | 24 | 50.0% | 0 |
| March 2025 | 22 | 22 | 68.2% | 0 |
| April 2025 | 25 | 25 | 72.0% | 0 |
| May 2025 | 26 | 26 | 80.8% | 0 |
| June 2025 | 8 | 8 | 50.0% | 0 |
| July 2025 | 4 | 4 | 25.0% | 0 |
| August 2025 | 15 | 15 | 40.0% | 0 |
| September 2025 | 17 | 17 | 41.2% | 0 |
| October 2025 | 50 | 50 | 70.0% | 0 |
| November 2025 | 16 | 16 | 81.3% | 0 |
| December 2025 | 27 | 26 | 69.2% | 1 |
| January 2026 | 4 | 4 | 75.0% | 0 |
| March 2026 | 27 | 27 | 85.2% | 0 |
| April 2026 | 20 | 20 | 70.0% | 0 |
| May 2026 | 18 | 18 | 27.8% | 0 |
| June 2026 | 21 | 21 | 42.9% | 0 |
| July 2026 | 19 | 17 | 52.9% | 2 |