WN636
WN636 (Southwest Airlines) is a multi-stop service on 39 routes, busiest Dallas to Kansas City. Of 693 departures recorded from October 2024 to July 2026, 66.9% left on time, according to the US BTS.
- On-time departures66.9%of 693 flights
- Average delay21.4 min
- July 202640▼ 38.5%vs July 2025
- Cancelled0.6%
- Legs flown under this number39
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 | 31 | 10 | ▼ 67.7% |
| February | 20 | 25 | ▲ 25.0% |
| March | 30 | 30 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 52 | 37 | ▼ 28.8% |
| July | 65 | 40 | ▼ 38.5% |
| August | 28 | – | – |
| September | 25 | – | – |
| October | 35 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 259 | 203 | ▼ 21.6% |
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 | 79.3% | 55.6% | ▼ 29.9% |
| February | 85.0% | 92.0% | ▲ 8.2% |
| March | 73.3% | 76.7% | ▲ 4.6% |
| April | 90.0% | 86.7% | ▼ 3.7% |
| May | 90.3% | 61.3% | ▼ 32.1% |
| June | 48.1% | 51.4% | ▲ 6.8% |
| July | 41.5% | 55.0% | ▲ 32.4% |
| August | 50.0% | – | – |
| September | 80.0% | – | – |
| October | 74.3% | – | in progress |
| November | 42.9% | – | – |
| December | 58.1% | – | – |
| Year-to-date average (Jan–Jul) | 72.5% | 68.4% | ▼ 5.7% |
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 | 2 | 1 | ▼ 50.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 1 | ▼ 50.0% |
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 99.4% 689
- Cancelled 0.6% 4
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
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DAL MCI Dallas Love Field – Kansas City International Airport | 743 | 12.4 min | 77.5% | 73 |
| ATL HOU Hartsfield Jackson Atlanta International Airport – William P. Hobby Airport | 1,118 | 1.0 min | 94.8% | 58 |
| LAX SFO Los Angeles International Airport – San Francisco International Airport | 543 | 48.4 min | 36.5% | 52 |
| DEN GRR Denver International Airport – Gerald R. Ford International Airport | 1,629 | 27.5 min | 45.7% | 46 |
| SEA SMF Seattle–Tacoma International Airport – Sacramento International Airport | 975 | 43.8 min | 45.2% | 42 |
| DEN SMF Denver International Airport – Sacramento International Airport | 1,460 | 8.7 min | 70.6% | 34 |
| SAN MCI San Diego International Airport – Kansas City International Airport | 2,142 | 14.7 min | 78.8% | 33 |
| BZN DEN Bozeman Yellowstone International Airport – Denver International Airport | 844 | 21.1 min | 69.7% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 73.7% | 0 |
| November 2024 | 31 | 31 | 83.9% | 0 |
| December 2024 | 33 | 33 | 75.8% | 0 |
| January 2025 | 31 | 29 | 79.3% | 2 |
| February 2025 | 20 | 20 | 85.0% | 0 |
| March 2025 | 30 | 30 | 73.3% | 0 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 52 | 52 | 48.1% | 0 |
| July 2025 | 65 | 65 | 41.5% | 0 |
| August 2025 | 28 | 28 | 50.0% | 0 |
| September 2025 | 25 | 25 | 80.0% | 0 |
| October 2025 | 35 | 35 | 74.3% | 0 |
| November 2025 | 29 | 28 | 42.9% | 1 |
| December 2025 | 31 | 31 | 58.1% | 0 |
| January 2026 | 10 | 9 | 55.6% | 1 |
| February 2026 | 25 | 25 | 92.0% | 0 |
| March 2026 | 30 | 30 | 76.7% | 0 |
| April 2026 | 30 | 30 | 86.7% | 0 |
| May 2026 | 31 | 31 | 61.3% | 0 |
| June 2026 | 37 | 37 | 51.4% | 0 |
| July 2026 | 40 | 40 | 55.0% | 0 |