WN4110
WN4110 (Southwest Airlines) is a multi-stop service on 26 routes, busiest St Louis to Phoenix. Of 341 departures recorded from October 2024 to July 2026, 74.5% left on time, according to the US BTS.
- On-time departures74.5%of 341 flights
- Average delay15.3 min
- July 202618▼ 61.7%vs July 2025
- Cancelled1.2%
- Legs flown under this number26
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 | 3 | 5 | ▲ 66.7% |
| February | 2 | 5 | ▲ 150.0% |
| March | 35 | 27 | ▼ 22.9% |
| April | 22 | 9 | ▼ 59.1% |
| May | 18 | 4 | ▼ 77.8% |
| June | 36 | 16 | ▼ 55.6% |
| July | 47 | 18 | ▼ 61.7% |
| August | 3 | – | – |
| September | – | – | – |
| October | 30 | – | in progress |
| November | 21 | – | – |
| December | 20 | – | – |
| Year to date (Jan–Jul) | 163 | 84 | ▼ 48.5% |
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 | 33.3% | 80.0% | ▲ 140.0% |
| February | 100.0% | 80.0% | ▼ 20.0% |
| March | 82.9% | 92.6% | ▲ 11.7% |
| April | 68.2% | 66.7% | ▼ 2.2% |
| May | 88.9% | 100.0% | ▲ 12.5% |
| June | 80.6% | 6.7% | ▼ 91.7% |
| July | 83.0% | 25.0% | ▼ 69.9% |
| August | 66.7% | – | – |
| September | – | – | – |
| October | 70.0% | – | in progress |
| November | 81.0% | – | – |
| December | 90.0% | – | – |
| Year-to-date average (Jan–Jul) | 76.7% | 64.4% | ▼ 16.0% |
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 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 1 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 4 |
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% 337
- Cancelled 1.2% 4
Share of all recorded flights in the period, all legs. · Oct 15, 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 |
|---|---|---|---|---|
| STL PHX St. Louis Lambert International Airport – Phoenix Sky Harbor International Airport | 2,026 | 8.8 min | 88.4% | 43 |
| OKC SAT OKC Will Rogers World Airport – San Antonio International Airport | 657 | 6.0 min | 83.7% | 43 |
| ORD PHX Chicago O'Hare International Airport – Phoenix Sky Harbor International Airport | 2,313 | 19.1 min | 66.7% | 36 |
| MDW BUF Chicago Midway International Airport – Buffalo Niagara International Airport | 752 | 52.4 min | 16.1% | 34 |
| OGG KOA Kahului International Airport – Ellison Onizuka Kona International Airport at Keāhole | 135 | -3.9 min | 93.9% | 33 |
| PHX COS Phoenix Sky Harbor International Airport – City of Colorado Springs Municipal Airport | 887 | 9.7 min | 84.4% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 100.0% | 0 |
| November 2024 | 4 | 4 | 100.0% | 0 |
| December 2024 | 10 | 10 | 50.0% | 0 |
| January 2025 | 3 | 3 | 33.3% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 35 | 35 | 82.9% | 0 |
| April 2025 | 22 | 22 | 68.2% | 0 |
| May 2025 | 18 | 18 | 88.9% | 0 |
| June 2025 | 36 | 36 | 80.6% | 0 |
| July 2025 | 47 | 47 | 83.0% | 0 |
| August 2025 | 3 | 3 | 66.7% | 0 |
| October 2025 | 30 | 30 | 70.0% | 0 |
| November 2025 | 21 | 21 | 81.0% | 0 |
| December 2025 | 20 | 20 | 90.0% | 0 |
| January 2026 | 5 | 5 | 80.0% | 0 |
| February 2026 | 5 | 5 | 80.0% | 0 |
| March 2026 | 27 | 27 | 92.6% | 0 |
| April 2026 | 9 | 9 | 66.7% | 0 |
| May 2026 | 4 | 3 | 100.0% | 1 |
| June 2026 | 16 | 15 | 6.7% | 1 |
| July 2026 | 18 | 16 | 25.0% | 2 |