WN3423
WN3423 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Phoenix to Chicago. Of 530 departures recorded from October 2024 to July 2026, 71.3% left on time, according to the US BTS.
- On-time departures71.3%of 530 flights
- Average delay14.6 min
- July 202630▼ 30.2%vs July 2025
- Cancelled0.2%
- Legs flown under this number20
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 | 25 | 5 | ▼ 80.0% |
| February | 16 | 3 | ▼ 81.3% |
| March | 15 | 4 | ▼ 73.3% |
| April | 29 | 35 | ▲ 20.7% |
| May | 34 | 44 | ▲ 29.4% |
| June | 43 | 31 | ▼ 27.9% |
| July | 43 | 30 | ▼ 30.2% |
| August | 20 | – | – |
| September | 17 | – | – |
| October | 42 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 205 | 152 | ▼ 25.9% |
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 | 88.0% | 80.0% | ▼ 9.1% |
| February | 68.8% | 100.0% | ▲ 45.5% |
| March | 60.0% | 100.0% | ▲ 66.7% |
| April | 72.4% | 68.6% | ▼ 5.3% |
| May | 72.7% | 43.2% | ▼ 40.6% |
| June | 48.8% | 96.8% | ▲ 98.1% |
| July | 58.1% | 90.0% | ▲ 54.8% |
| August | 70.0% | – | – |
| September | 94.1% | – | – |
| October | 78.6% | – | in progress |
| November | 82.1% | – | – |
| December | 72.4% | – | – |
| Year-to-date average (Jan–Jul) | 67.0% | 82.6% | ▲ 23.4% |
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 | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 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 99.8% 529
- Cancelled 0.2% 1
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 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 |
|---|---|---|---|---|
| PHX MDW Phoenix Sky Harbor International Airport – Chicago Midway International Airport | 2,319 | 11.5 min | 70.8% | 72 |
| HOU SAT William P. Hobby Airport – San Antonio International Airport | 309 | 24.6 min | 45.9% | 61 |
| LBB DAL Lubbock Preston Smith International Airport – Dallas Love Field | 472 | 9.6 min | 80.0% | 60 |
| MIA BNA Miami International Airport – Nashville International Airport | 1,299 | 15.8 min | 77.2% | 58 |
| CMH BWI John Glenn Columbus International Airport – Baltimore/Washington International Thurgood Marshall Airport | 541 | 30.3 min | 48.3% | 58 |
| MKE MCO General Mitchell International Airport – Orlando International Airport | 1,719 | 1.9 min | 94.7% | 57 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 4.1 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 100.0% | 0 |
| November 2024 | 16 | 16 | 56.3% | 0 |
| December 2024 | 12 | 12 | 66.7% | 0 |
| January 2025 | 25 | 25 | 88.0% | 0 |
| February 2025 | 16 | 16 | 68.8% | 0 |
| March 2025 | 15 | 15 | 60.0% | 0 |
| April 2025 | 29 | 29 | 72.4% | 0 |
| May 2025 | 34 | 33 | 72.7% | 1 |
| June 2025 | 43 | 43 | 48.8% | 0 |
| July 2025 | 43 | 43 | 58.1% | 0 |
| August 2025 | 20 | 20 | 70.0% | 0 |
| September 2025 | 17 | 17 | 94.1% | 0 |
| October 2025 | 42 | 42 | 78.6% | 0 |
| November 2025 | 28 | 28 | 82.1% | 0 |
| December 2025 | 29 | 29 | 72.4% | 0 |
| January 2026 | 5 | 5 | 80.0% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 4 | 4 | 100.0% | 0 |
| April 2026 | 35 | 35 | 68.6% | 0 |
| May 2026 | 44 | 44 | 43.2% | 0 |
| June 2026 | 31 | 31 | 96.8% | 0 |
| July 2026 | 30 | 30 | 90.0% | 0 |