WN1663
WN1663 (Southwest Airlines) is a multi-stop service on 21 routes, busiest St Louis to Denver. Of 538 departures recorded from October 2024 to July 2026, 62.7% left on time, according to the US BTS.
- On-time departures62.7%of 538 flights
- Average delay20.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.3%
- Legs flown under this number21
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 | 28 | 27 | ▼ 3.6% |
| February | 26 | 24 | ▼ 7.7% |
| March | 31 | 12 | ▼ 61.3% |
| April | 30 | 2 | ▼ 93.3% |
| May | 31 | 1 | ▼ 96.8% |
| June | 30 | 27 | ▼ 10.0% |
| July | 31 | 31 | 0.0% |
| August | 26 | – | – |
| September | 26 | – | – |
| October | 22 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 207 | 124 | ▼ 40.1% |
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 | 75.0% | 59.3% | ▼ 21.0% |
| February | 69.2% | 50.0% | ▼ 27.8% |
| March | 80.0% | 75.0% | ▼ 6.3% |
| April | 65.5% | 50.0% | ▼ 23.7% |
| May | 58.1% | 100.0% | ▲ 72.2% |
| June | 60.0% | 14.8% | ▼ 75.3% |
| July | 53.6% | 29.0% | ▼ 45.8% |
| August | 40.0% | – | – |
| September | 69.2% | – | – |
| October | 63.6% | – | in progress |
| November | 89.3% | – | – |
| December | 62.1% | – | – |
| Year-to-date average (Jan–Jul) | 65.9% | 54.0% | ▼ 18.1% |
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 | 1 | 0 | ▼ 100.0% |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 3 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 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 98.7% 531
- Cancelled 1.3% 7
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL DEN St. Louis Lambert International Airport – Denver International Airport | 1,236 | 10.7 min | 76.9% | 109 |
| RSW BWI Southwest Florida International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,483 | 37.4 min | 55.2% | 61 |
| DEN ONT Denver International Airport – Ontario International Airport | 1,316 | 42.5 min | 21.1% | 57 |
| DEN TPA Denver International Airport – Tampa International Airport | 2,423 | 20.9 min | 56.0% | 50 |
| BWI DEN Baltimore/Washington International Thurgood Marshall Airport – Denver International Airport | 2,394 | 9.6 min | 83.3% | 42 |
| BNA MIA Nashville International Airport – Miami International Airport | 1,299 | 17.8 min | 65.0% | 40 |
| ABQ AUS Albuquerque International Sunport – Austin Bergstrom International Airport | 995 | 17.5 min | 75.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 26 | 25 | 84.0% | 1 |
| December 2024 | 30 | 30 | 80.0% | 0 |
| January 2025 | 28 | 28 | 75.0% | 0 |
| February 2025 | 26 | 26 | 69.2% | 0 |
| March 2025 | 31 | 30 | 80.0% | 1 |
| April 2025 | 30 | 29 | 65.5% | 1 |
| May 2025 | 31 | 31 | 58.1% | 0 |
| June 2025 | 30 | 30 | 60.0% | 0 |
| July 2025 | 31 | 28 | 53.6% | 3 |
| August 2025 | 26 | 25 | 40.0% | 1 |
| September 2025 | 26 | 26 | 69.2% | 0 |
| October 2025 | 22 | 22 | 63.6% | 0 |
| November 2025 | 28 | 28 | 89.3% | 0 |
| December 2025 | 29 | 29 | 62.1% | 0 |
| January 2026 | 27 | 27 | 59.3% | 0 |
| February 2026 | 24 | 24 | 50.0% | 0 |
| March 2026 | 12 | 12 | 75.0% | 0 |
| April 2026 | 2 | 2 | 50.0% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 27 | 27 | 14.8% | 0 |
| July 2026 | 31 | 31 | 29.0% | 0 |