WN3837
WN3837 (Southwest Airlines) is a multi-stop service on 15 routes, busiest Phoenix to Oakland. Of 292 departures recorded from October 2024 to July 2026, 69.0% left on time, according to the US BTS.
- On-time departures69.0%of 292 flights
- Average delay15.6 min
- July 202627▲ 50.0%vs July 2025
- Cancelled1.7%
- Legs flown under this number15
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 19 | ▲ 850.0% |
| February | – | 28 | – |
| March | 26 | 30 | ▲ 15.4% |
| April | 13 | 30 | ▲ 130.8% |
| May | 9 | 30 | ▲ 233.3% |
| June | 15 | 26 | ▲ 73.3% |
| July | 18 | 27 | ▲ 50.0% |
| August | 2 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 3 | – | – |
| December | 3 | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 0.0% | 94.1% | – |
| February | – | 82.1% | – |
| March | 88.5% | 72.4% | ▼ 18.1% |
| April | 69.2% | 40.0% | ▼ 42.2% |
| May | 66.7% | 50.0% | ▼ 25.0% |
| June | 71.4% | 57.7% | ▼ 19.2% |
| July | 66.7% | 92.6% | ▲ 38.9% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | 33.3% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 2 | ▲ 100.0% |
| February | – | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | 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 98.3% 287
- Cancelled 1.7% 5
Share of all recorded flights in the period, all legs. · Oct 31, 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 OAK Phoenix Sky Harbor International Airport – Oakland San Francisco Bay Airport | 1,039 | 33.4 min | 42.1% | 57 |
| SMF SNA Sacramento International Airport – John Wayne Orange County International Airport | 650 | 4.8 min | 76.2% | 42 |
| OAK LAX Oakland San Francisco Bay Airport – Los Angeles International Airport | 543 | 20.5 min | 66.7% | 34 |
| PHX ORD Phoenix Sky Harbor International Airport – Chicago O'Hare International Airport | 2,313 | 21.5 min | 71.9% | 33 |
| BWI SAT Baltimore/Washington International Thurgood Marshall Airport – San Antonio International Airport | 2,262 | 10.0 min | 78.8% | 33 |
| TPA ALB Tampa International Airport – Albany International Airport | 1,821 | -0.8 min | 93.1% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 1 | 1 | 100.0% | 0 |
| November 2024 | 2 | 2 | 50.0% | 0 |
| December 2024 | 8 | 8 | 50.0% | 0 |
| January 2025 | 2 | 1 | 0.0% | 1 |
| March 2025 | 26 | 26 | 88.5% | 0 |
| April 2025 | 13 | 13 | 69.2% | 0 |
| May 2025 | 9 | 9 | 66.7% | 0 |
| June 2025 | 15 | 14 | 71.4% | 1 |
| July 2025 | 18 | 18 | 66.7% | 0 |
| August 2025 | 2 | 2 | 50.0% | 0 |
| November 2025 | 3 | 3 | 100.0% | 0 |
| December 2025 | 3 | 3 | 33.3% | 0 |
| January 2026 | 19 | 17 | 94.1% | 2 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 30 | 29 | 72.4% | 1 |
| April 2026 | 30 | 30 | 40.0% | 0 |
| May 2026 | 30 | 30 | 50.0% | 0 |
| June 2026 | 26 | 26 | 57.7% | 0 |
| July 2026 | 27 | 27 | 92.6% | 0 |