WN3421
WN3421 (Southwest Airlines) is a multi-stop service on 24 routes, busiest St Louis to Columbus. Of 533 departures recorded from October 2024 to July 2026, 69.6% left on time, according to the US BTS.
- On-time departures69.6%of 533 flights
- Average delay17.9 min
- July 202627▼ 10.0%vs July 2025
- Cancelled1.1%
- Legs flown under this number24
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 12 | 37 | ▲ 208.3% |
| February | 9 | 26 | ▲ 188.9% |
| March | 5 | 4 | ▼ 20.0% |
| April | 41 | 24 | ▼ 41.5% |
| May | 54 | 30 | ▼ 44.4% |
| June | 33 | 26 | ▼ 21.2% |
| July | 30 | 27 | ▼ 10.0% |
| August | 7 | – | – |
| September | 4 | – | – |
| October | 14 | – | in progress |
| November | 31 | – | – |
| December | 33 | – | – |
| Year to date (Jan–Jul) | 184 | 174 | ▼ 5.4% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 75.0% | 77.8% | ▲ 3.7% |
| February | 88.9% | 34.6% | ▼ 61.1% |
| March | 60.0% | 75.0% | ▲ 25.0% |
| April | 79.5% | 65.2% | ▼ 18.0% |
| May | 75.9% | 51.7% | ▼ 31.9% |
| June | 54.6% | 68.0% | ▲ 24.7% |
| July | 56.7% | 55.6% | ▼ 2.0% |
| August | 85.7% | – | – |
| September | 100.0% | – | – |
| October | 100.0% | – | in progress |
| November | 67.7% | – | – |
| December | 75.8% | – | – |
| Year-to-date average (Jan–Jul) | 70.1% | 61.1% | ▼ 12.8% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 2 | 1 | ▼ 50.0% |
| May | 0 | 1 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 100.0% |
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 98.9% 527
- Cancelled 1.1% 6
Share of all recorded flights in the period, all legs. · Oct 12, 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 CMH St. Louis Lambert International Airport – John Glenn Columbus International Airport | 657 | 30.9 min | 53.3% | 60 |
| DAL LBB Dallas Love Field – Lubbock Preston Smith International Airport | 472 | 9.1 min | 79.0% | 58 |
| DAL MCO Dallas Love Field – Orlando International Airport | 1,564 | 25.8 min | 57.4% | 57 |
| SAN SFO San Diego International Airport – San Francisco International Airport | 719 | 27.4 min | 59.3% | 55 |
| RDU BNA Raleigh-Durham International Airport – Nashville International Airport | 710 | 28.4 min | 62.0% | 50 |
| LAX TUS Los Angeles International Airport – Tucson International Airport | 725 | 23.5 min | 58.3% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 40 | 40 | 82.5% | 0 |
| December 2024 | 26 | 26 | 73.1% | 0 |
| January 2025 | 12 | 12 | 75.0% | 0 |
| February 2025 | 9 | 9 | 88.9% | 0 |
| March 2025 | 5 | 5 | 60.0% | 0 |
| April 2025 | 41 | 39 | 79.5% | 2 |
| May 2025 | 54 | 54 | 75.9% | 0 |
| June 2025 | 33 | 33 | 54.6% | 0 |
| July 2025 | 30 | 30 | 56.7% | 0 |
| August 2025 | 7 | 7 | 85.7% | 0 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| October 2025 | 14 | 14 | 100.0% | 0 |
| November 2025 | 31 | 31 | 67.7% | 0 |
| December 2025 | 33 | 33 | 75.8% | 0 |
| January 2026 | 37 | 36 | 77.8% | 1 |
| February 2026 | 26 | 26 | 34.6% | 0 |
| March 2026 | 4 | 4 | 75.0% | 0 |
| April 2026 | 24 | 23 | 65.2% | 1 |
| May 2026 | 30 | 29 | 51.7% | 1 |
| June 2026 | 26 | 25 | 68.0% | 1 |
| July 2026 | 27 | 27 | 55.6% | 0 |