WN4106
WN4106 (Southwest Airlines) is a multi-stop service on 15 routes, busiest San Francisco to Phoenix. Of 334 departures recorded from October 2024 to July 2026, 72.4% left on time, according to the US BTS.
- On-time departures72.4%of 334 flights
- Average delay12.7 min
- July 202623▲ 9.5%vs July 2025
- Cancelled1.2%
- 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 periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 5 | ▲ 400.0% |
| February | – | 2 | – |
| March | 26 | 27 | ▲ 3.8% |
| April | 7 | 27 | ▲ 285.7% |
| May | 1 | 25 | ▲ 2,400.0% |
| June | 20 | 22 | ▲ 10.0% |
| July | 21 | 23 | ▲ 9.5% |
| August | 11 | – | – |
| September | 8 | – | – |
| October | 37 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
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 | 0.0% | 60.0% | – |
| February | – | 100.0% | – |
| March | 88.5% | 92.3% | ▲ 4.4% |
| April | 71.4% | 81.5% | ▲ 14.1% |
| May | 100.0% | 76.0% | ▼ 24.0% |
| June | 70.0% | 38.1% | ▼ 45.6% |
| July | 81.0% | 26.1% | ▼ 67.8% |
| August | 100.0% | – | – |
| September | 100.0% | – | – |
| October | 78.4% | – | in progress |
| November | 70.4% | – | – |
| December | 58.1% | – | – |
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 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| 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 98.8% 330
- Cancelled 1.2% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO PHX San Francisco International Airport – Phoenix Sky Harbor International Airport | 1,047 | 23.6 min | 64.5% | 64 |
| SAN PHX San Diego International Airport – Phoenix Sky Harbor International Airport | 489 | 5.2 min | 77.6% | 49 |
| PHX SEA Phoenix Sky Harbor International Airport – Seattle–Tacoma International Airport | 1,782 | 10.5 min | 77.8% | 45 |
| BOS MDW Boston Logan International Airport – Chicago Midway International Airport | 1,381 | 36.1 min | 26.8% | 42 |
| OGG HNL Kahului International Airport – Daniel K. Inouye International Airport | 162 | 0.2 min | 93.8% | 33 |
| LIH HNL Lihue Airport – Daniel K. Inouye International Airport | 163 | 1.9 min | 84.9% | 33 |
| ORD DAL Chicago O'Hare International Airport – Dallas Love Field | 1,285 | 10.8 min | 76.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 88.9% | 0 |
| December 2024 | 2 | 2 | 100.0% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| March 2025 | 26 | 26 | 88.5% | 0 |
| April 2025 | 7 | 7 | 71.4% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 20 | 20 | 70.0% | 0 |
| July 2025 | 21 | 21 | 81.0% | 0 |
| August 2025 | 11 | 11 | 100.0% | 0 |
| September 2025 | 8 | 8 | 100.0% | 0 |
| October 2025 | 37 | 37 | 78.4% | 0 |
| November 2025 | 29 | 27 | 70.4% | 2 |
| December 2025 | 31 | 31 | 58.1% | 0 |
| January 2026 | 5 | 5 | 60.0% | 0 |
| February 2026 | 2 | 2 | 100.0% | 0 |
| March 2026 | 27 | 26 | 92.3% | 1 |
| April 2026 | 27 | 27 | 81.5% | 0 |
| May 2026 | 25 | 25 | 76.0% | 0 |
| June 2026 | 22 | 21 | 38.1% | 1 |
| July 2026 | 23 | 23 | 26.1% | 0 |