WN3678
WN3678 (Southwest Airlines) is a multi-stop service on 26 routes, busiest St Louis to Atlanta. Of 480 departures recorded from October 2024 to July 2026, 78.7% left on time, according to the US BTS.
- On-time departures78.7%of 480 flights
- Average delay11.7 min
- July 202616▼ 15.8%vs July 2025
- Cancelled1.0%
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 32 | 30 | ▼ 6.3% |
| February | 30 | 25 | ▼ 16.7% |
| March | 43 | 31 | ▼ 27.9% |
| April | 34 | 6 | ▼ 82.4% |
| May | 37 | – | – |
| June | 17 | 15 | ▼ 11.8% |
| July | 19 | 16 | ▼ 15.8% |
| August | 2 | – | – |
| September | – | – | – |
| October | 5 | – | 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 82.8% | 90.0% | ▲ 8.7% |
| February | 73.3% | 56.0% | ▼ 23.6% |
| March | 90.7% | 58.1% | ▼ 36.0% |
| April | 85.3% | 83.3% | ▼ 2.3% |
| May | 86.5% | – | – |
| June | 47.1% | 80.0% | ▲ 70.0% |
| July | 63.2% | 93.8% | ▲ 48.4% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 92.9% | – | – |
| December | 74.2% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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 99.0% 475
- Cancelled 1.0% 5
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 |
|---|---|---|---|---|
| STL ATL St. Louis Lambert International Airport – Hartsfield Jackson Atlanta International Airport | 779 | 11.2 min | 83.3% | 93 |
| MDW BOS Chicago Midway International Airport – Boston Logan International Airport | 1,381 | 10.8 min | 82.5% | 64 |
| SMF SEA Sacramento International Airport – Seattle–Tacoma International Airport | 975 | 14.6 min | 72.2% | 54 |
| MSY BNA Louis Armstrong New Orleans International Airport – Nashville International Airport | 759 | 1.7 min | 92.3% | 39 |
| SLC DEN Salt Lake City International Airport – Denver International Airport | 628 | 19.0 min | 63.6% | 33 |
| SAN PHX San Diego International Airport – Phoenix Sky Harbor International Airport | 489 | 9.2 min | 84.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 11 | 81.8% | 1 |
| November 2024 | 40 | 40 | 82.5% | 0 |
| December 2024 | 26 | 26 | 76.9% | 0 |
| January 2025 | 32 | 29 | 82.8% | 3 |
| February 2025 | 30 | 30 | 73.3% | 0 |
| March 2025 | 43 | 43 | 90.7% | 0 |
| April 2025 | 34 | 34 | 85.3% | 0 |
| May 2025 | 37 | 37 | 86.5% | 0 |
| June 2025 | 17 | 17 | 47.1% | 0 |
| July 2025 | 19 | 19 | 63.2% | 0 |
| August 2025 | 2 | 2 | 50.0% | 0 |
| October 2025 | 5 | 5 | 100.0% | 0 |
| November 2025 | 29 | 28 | 92.9% | 1 |
| December 2025 | 31 | 31 | 74.2% | 0 |
| January 2026 | 30 | 30 | 90.0% | 0 |
| February 2026 | 25 | 25 | 56.0% | 0 |
| March 2026 | 31 | 31 | 58.1% | 0 |
| April 2026 | 6 | 6 | 83.3% | 0 |
| June 2026 | 15 | 15 | 80.0% | 0 |
| July 2026 | 16 | 16 | 93.8% | 0 |