WN3917
WN3917 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Dallas to St Louis. Of 409 departures recorded from October 2024 to July 2026, 66.0% left on time, according to the US BTS.
- On-time departures66.0%of 409 flights
- Average delay20.3 min
- July 202616▼ 40.7%vs July 2025
- Cancelled0.7%
- Legs flown under this number18
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 22 | 8 | ▼ 63.6% |
| February | 21 | – | – |
| March | 30 | 27 | ▼ 10.0% |
| April | 16 | 30 | ▲ 87.5% |
| May | 14 | 31 | ▲ 121.4% |
| June | 23 | 18 | ▼ 21.7% |
| July | 27 | 16 | ▼ 40.7% |
| August | 3 | – | – |
| September | – | – | – |
| October | 22 | – | in progress |
| November | 26 | – | – |
| December | 37 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 61.9% | 75.0% | ▲ 21.2% |
| February | 81.0% | – | – |
| March | 86.2% | 37.0% | ▼ 57.0% |
| April | 87.5% | 66.7% | ▼ 23.8% |
| May | 78.6% | 22.6% | ▼ 71.3% |
| June | 73.9% | 72.2% | ▼ 2.3% |
| July | 70.4% | 86.7% | ▲ 23.2% |
| August | 66.7% | – | – |
| September | – | – | – |
| October | 86.4% | – | in progress |
| November | 76.9% | – | – |
| December | 37.8% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | – | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | 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 99.3% 406
- 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DAL STL Dallas Love Field – St. Louis Lambert International Airport | 878 | 15.1 min | 68.1% | 73 |
| MDW SFO Chicago Midway International Airport – San Francisco International Airport | 2,977 | 40.5 min | 41.4% | 58 |
| MDW SJC Chicago Midway International Airport – Mineta San Jose International Airport | 2,950 | 15.8 min | 70.6% | 51 |
| OAK SNA Oakland San Francisco Bay Airport – John Wayne Orange County International Airport | 597 | 24.5 min | 62.5% | 40 |
| PHX SMF Phoenix Sky Harbor International Airport – Sacramento International Airport | 1,040 | -1.8 min | 96.9% | 33 |
| MDW CVG Chicago Midway International Airport – Cincinnati Northern Kentucky International Airport | 401 | 42.0 min | 45.5% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 80.0% | 0 |
| November 2024 | 18 | 18 | 72.2% | 0 |
| December 2024 | 10 | 10 | 70.0% | 0 |
| January 2025 | 22 | 21 | 61.9% | 1 |
| February 2025 | 21 | 21 | 81.0% | 0 |
| March 2025 | 30 | 29 | 86.2% | 1 |
| April 2025 | 16 | 16 | 87.5% | 0 |
| May 2025 | 14 | 14 | 78.6% | 0 |
| June 2025 | 23 | 23 | 73.9% | 0 |
| July 2025 | 27 | 27 | 70.4% | 0 |
| August 2025 | 3 | 3 | 66.7% | 0 |
| October 2025 | 22 | 22 | 86.4% | 0 |
| November 2025 | 26 | 26 | 76.9% | 0 |
| December 2025 | 37 | 37 | 37.8% | 0 |
| January 2026 | 8 | 8 | 75.0% | 0 |
| March 2026 | 27 | 27 | 37.0% | 0 |
| April 2026 | 30 | 30 | 66.7% | 0 |
| May 2026 | 31 | 31 | 22.6% | 0 |
| June 2026 | 18 | 18 | 72.2% | 0 |
| July 2026 | 16 | 15 | 86.7% | 1 |