WN3404
WN3404 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Chicago to Denver. Of 548 departures recorded from October 2024 to July 2026, 72.3% left on time, according to the US BTS.
- On-time departures72.3%of 548 flights
- Average delay12.9 min
- July 20269▼ 76.9%vs July 2025
- Cancelled0.6%
- Legs flown under this number23
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 | 37 | 2 | ▼ 94.6% |
| February | 43 | 10 | ▼ 76.7% |
| March | 29 | 5 | ▼ 82.8% |
| April | 26 | 25 | ▼ 3.8% |
| May | 26 | 31 | ▲ 19.2% |
| June | 38 | 10 | ▼ 73.7% |
| July | 39 | 9 | ▼ 76.9% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 31 | – | in progress |
| November | 26 | – | – |
| December | 20 | – | – |
| Year to date (Jan–Jul) | 238 | 92 | ▼ 61.3% |
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 | 86.5% | 50.0% | ▼ 42.2% |
| February | 72.1% | 40.0% | ▼ 44.5% |
| March | 72.4% | 60.0% | ▼ 17.1% |
| April | 76.9% | 64.0% | ▼ 16.8% |
| May | 92.0% | 64.5% | ▼ 29.9% |
| June | 54.1% | 60.0% | ▲ 11.0% |
| July | 50.0% | 77.8% | ▲ 55.6% |
| August | 59.3% | – | – |
| September | 76.9% | – | – |
| October | 74.2% | – | in progress |
| November | 80.8% | – | – |
| December | 70.0% | – | – |
| Year-to-date average (Jan–Jul) | 72.0% | 59.5% | ▼ 17.4% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 1 | 0 | ▼ 100.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 0 | ▼ 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 99.5% 545
- Cancelled 0.5% 3
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| MDW DEN Chicago Midway International Airport – Denver International Airport | 1,438 | 13.0 min | 67.2% | 58 |
| LAS PSP Harry Reid International Airport – Palm Springs International Airport | 279 | 7.8 min | 82.1% | 56 |
| PSP OAK Palm Springs International Airport – Oakland San Francisco Bay Airport | 673 | 4.8 min | 84.6% | 52 |
| LAS SAN Harry Reid International Airport – San Diego International Airport | 417 | 23.7 min | 56.0% | 52 |
| DAL SLC Dallas Love Field – Salt Lake City International Airport | 1,607 | 8.6 min | 87.8% | 50 |
| LAX OAK Los Angeles International Airport – Oakland San Francisco Bay Airport | 543 | 8.5 min | 75.5% | 49 |
| SJC SEA Mineta San Jose International Airport – Seattle–Tacoma International Airport | 1,122 | 11.9 min | 73.2% | 41 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 100.0% | 0 |
| November 2024 | 44 | 44 | 77.3% | 0 |
| December 2024 | 38 | 38 | 97.4% | 0 |
| January 2025 | 37 | 37 | 86.5% | 0 |
| February 2025 | 43 | 43 | 72.1% | 0 |
| March 2025 | 29 | 29 | 72.4% | 0 |
| April 2025 | 26 | 26 | 76.9% | 0 |
| May 2025 | 26 | 25 | 92.0% | 1 |
| June 2025 | 38 | 37 | 54.1% | 1 |
| July 2025 | 39 | 38 | 50.0% | 1 |
| August 2025 | 27 | 27 | 59.3% | 0 |
| September 2025 | 26 | 26 | 76.9% | 0 |
| October 2025 | 31 | 31 | 74.2% | 0 |
| November 2025 | 26 | 26 | 80.8% | 0 |
| December 2025 | 20 | 20 | 70.0% | 0 |
| January 2026 | 2 | 2 | 50.0% | 0 |
| February 2026 | 10 | 10 | 40.0% | 0 |
| March 2026 | 5 | 5 | 60.0% | 0 |
| April 2026 | 25 | 25 | 64.0% | 0 |
| May 2026 | 31 | 31 | 64.5% | 0 |
| June 2026 | 10 | 10 | 60.0% | 0 |
| July 2026 | 9 | 9 | 77.8% | 0 |