WN3687
WN3687 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Chicago to Phoenix. Of 420 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 420 flights
- Average delay11.5 min
- July 20263▼ 89.3%vs July 2025
- Cancelled0.5%
- Legs flown under this number23
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 | 8 | 25 | ▲ 212.5% |
| February | 4 | 27 | ▲ 575.0% |
| March | 19 | 31 | ▲ 63.2% |
| April | 5 | 36 | ▲ 620.0% |
| May | – | 39 | – |
| June | – | 7 | – |
| July | 28 | 3 | ▼ 89.3% |
| August | 23 | – | – |
| September | 22 | – | – |
| October | 27 | – | in progress |
| November | 26 | – | – |
| December | 22 | – | – |
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 | 50.0% | 84.0% | ▲ 68.0% |
| February | 50.0% | 88.9% | ▲ 77.8% |
| March | 79.0% | 67.7% | ▼ 14.2% |
| April | 80.0% | 88.9% | ▲ 11.1% |
| May | – | 82.1% | – |
| June | – | 57.1% | – |
| July | 81.5% | 33.3% | ▼ 59.1% |
| August | 72.7% | – | – |
| September | 86.4% | – | – |
| October | 81.5% | – | in progress |
| November | 84.6% | – | – |
| December | 68.2% | – | – |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | – | 0 | – |
| June | – | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| 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 99.5% 418
- Cancelled 0.5% 2
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 25, 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 |
|---|---|---|---|---|
| ORD PHX Chicago O'Hare International Airport – Phoenix Sky Harbor International Airport | 2,313 | 4.1 min | 93.0% | 57 |
| SMF SNA Sacramento International Airport – John Wayne Orange County International Airport | 650 | -1.0 min | 90.6% | 53 |
| BWI SJU Baltimore/Washington International Thurgood Marshall Airport – Luis Munoz Marin International Airport | 2,525 | 19.0 min | 76.1% | 46 |
| MDW DTW Chicago Midway International Airport – Detroit Metropolitan Wayne County Airport | 367 | 12.5 min | 80.5% | 42 |
| LGB HOU Long Beach International Airport – William P. Hobby Airport | 2,207 | 16.4 min | 69.7% | 33 |
| ITO HNL Hilo International Airport – Daniel K. Inouye International Airport | 349 | 7.5 min | 80.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 100.0% | 0 |
| November 2024 | 24 | 24 | 75.0% | 0 |
| December 2024 | 26 | 26 | 69.2% | 0 |
| January 2025 | 8 | 8 | 50.0% | 0 |
| February 2025 | 4 | 4 | 50.0% | 0 |
| March 2025 | 19 | 19 | 79.0% | 0 |
| April 2025 | 5 | 5 | 80.0% | 0 |
| July 2025 | 28 | 27 | 81.5% | 1 |
| August 2025 | 23 | 22 | 72.7% | 1 |
| September 2025 | 22 | 22 | 86.4% | 0 |
| October 2025 | 27 | 27 | 81.5% | 0 |
| November 2025 | 26 | 26 | 84.6% | 0 |
| December 2025 | 22 | 22 | 68.2% | 0 |
| January 2026 | 25 | 25 | 84.0% | 0 |
| February 2026 | 27 | 27 | 88.9% | 0 |
| March 2026 | 31 | 31 | 67.7% | 0 |
| April 2026 | 36 | 36 | 88.9% | 0 |
| May 2026 | 39 | 39 | 82.1% | 0 |
| June 2026 | 7 | 7 | 57.1% | 0 |
| July 2026 | 3 | 3 | 33.3% | 0 |