WN1645
WN1645 (Southwest Airlines) is a multi-stop service on 32 routes, busiest Knoxville to Denver. Of 679 departures recorded from October 2024 to July 2026, 76.2% left on time, according to the US BTS.
- On-time departures76.2%of 679 flights
- Average delay14.6 min
- July 202662▲ 226.3%vs July 2025
- Cancelled0.6%
- Legs flown under this number32
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 30 | 24 | ▼ 20.0% |
| February | 26 | 19 | ▼ 26.9% |
| March | 35 | 26 | ▼ 25.7% |
| April | 31 | 19 | ▼ 38.7% |
| May | 30 | 17 | ▼ 43.3% |
| June | 18 | 56 | ▲ 211.1% |
| July | 19 | 62 | ▲ 226.3% |
| August | 27 | – | – |
| September | 30 | – | – |
| October | 50 | – | in progress |
| November | 43 | – | – |
| December | 36 | – | – |
| Year to date (Jan–Jul) | 189 | 223 | ▲ 18.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 78.6% | 91.7% | ▲ 16.7% |
| February | 73.1% | 52.6% | ▼ 28.0% |
| March | 71.4% | 76.9% | ▲ 7.7% |
| April | 71.0% | 100.0% | ▲ 40.9% |
| May | 66.7% | 100.0% | ▲ 50.0% |
| June | 94.1% | 44.6% | ▼ 52.6% |
| July | 94.7% | 58.1% | ▼ 38.7% |
| August | 85.2% | – | – |
| September | 93.3% | – | – |
| October | 82.0% | – | in progress |
| November | 88.4% | – | – |
| December | 80.6% | – | – |
| Year-to-date average (Jan–Jul) | 78.5% | 74.8% | ▼ 4.7% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 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 not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.4% 675
- 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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| TYS DEN McGhee Tyson Airport – Denver International Airport | 1,866 | 35.5 min | 43.9% | 57 |
| MDW MIA Chicago Midway International Airport – Miami International Airport | 1,905 | 28.1 min | 71.9% | 57 |
| LAS HOU Harry Reid International Airport – William P. Hobby Airport | 1,985 | 8.6 min | 76.0% | 51 |
| SAT DEN San Antonio International Airport – Denver International Airport | 1,280 | 1.4 min | 89.8% | 49 |
| HRL AUS Valley International Airport – Austin Bergstrom International Airport | 441 | 7.0 min | 87.0% | 46 |
| DEN SMF Denver International Airport – Sacramento International Airport | 1,460 | 15.5 min | 66.7% | 39 |
| SDF MCO Louisville Muhammad Ali International Airport – Orlando International Airport | 1,158 | 0.3 min | 93.9% | 34 |
| DAL TPA Dallas Love Field – Tampa International Airport | 1,474 | -1.2 min | 100.0% | 33 |
| MCO TYS Orlando International Airport – McGhee Tyson Airport | 859 | 31.1 min | 71.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 26 | 26 | 84.6% | 0 |
| November 2024 | 25 | 25 | 80.0% | 0 |
| December 2024 | 30 | 29 | 75.9% | 1 |
| January 2025 | 30 | 28 | 78.6% | 2 |
| February 2025 | 26 | 26 | 73.1% | 0 |
| March 2025 | 35 | 35 | 71.4% | 0 |
| April 2025 | 31 | 31 | 71.0% | 0 |
| May 2025 | 30 | 30 | 66.7% | 0 |
| June 2025 | 18 | 17 | 94.1% | 1 |
| July 2025 | 19 | 19 | 94.7% | 0 |
| August 2025 | 27 | 27 | 85.2% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 50 | 50 | 82.0% | 0 |
| November 2025 | 43 | 43 | 88.4% | 0 |
| December 2025 | 36 | 36 | 80.6% | 0 |
| January 2026 | 24 | 24 | 91.7% | 0 |
| February 2026 | 19 | 19 | 52.6% | 0 |
| March 2026 | 26 | 26 | 76.9% | 0 |
| April 2026 | 19 | 19 | 100.0% | 0 |
| May 2026 | 17 | 17 | 100.0% | 0 |
| June 2026 | 56 | 56 | 44.6% | 0 |
| July 2026 | 62 | 62 | 58.1% | 0 |