WN1873
WN1873 (Southwest Airlines) is a multi-stop service on 36 routes, busiest Nashville to Washington. Of 741 departures recorded from October 2024 to April 2026, 77.8% left on time, according to the US BTS.
- On-time departures77.8%of 741 flights
- Average delay11.7 min
- April 20266▼ 81.8%vs April 2025
- Cancelled1.1%
- Legs flown under this number36
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 22 | 57 | ▲ 159.1% |
| February | 41 | 62 | ▲ 51.2% |
| March | 54 | 36 | ▼ 33.3% |
| April | 33 | 6 | ▼ 81.8% |
| May | 29 | – | – |
| June | 19 | – | – |
| July | 17 | – | – |
| August | 65 | – | – |
| September | 73 | – | – |
| October | 65 | – | in progress |
| November | 30 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Apr) | 150 | 161 | ▲ 7.3% |
according to the US BTS · October 2024 → April 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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 85.7% | 78.2% | ▼ 8.8% |
| February | 65.9% | 71.7% | ▲ 8.8% |
| March | 85.2% | 80.6% | ▼ 5.4% |
| April | 81.8% | 100.0% | ▲ 22.2% |
| May | 82.8% | – | – |
| June | 57.9% | – | – |
| July | 25.0% | – | – |
| August | 67.2% | – | – |
| September | 71.2% | – | – |
| October | 84.4% | – | in progress |
| November | 96.7% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Apr) | 79.6% | 82.6% | ▲ 3.7% |
according to the US BTS · October 2024 → April 2026
Average departure delay by month
according to the US BTS · October 2024 → April 2026
Cancelled departures by month
The most recent periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 2 | ▲ 100.0% |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | – | – |
| July | 1 | – | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Apr) | 1 | 4 | ▲ 300.0% |
according to the US BTS · October 2024 → April 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 98.9% 733
- Cancelled 1.1% 8
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Apr 6, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
9| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BNA DCA Nashville International Airport – Ronald Reagan Washington National Airport | 903 | 13.1 min | 74.2% | 94 |
| STL HOU St. Louis Lambert International Airport – William P. Hobby Airport | 1,108 | 0.4 min | 90.5% | 63 |
| STL MSP St. Louis Lambert International Airport – Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field | 722 | 13.0 min | 86.0% | 50 |
| DJT ISP President Donald J. Trump International Airport – Long Island MacArthur Airport | 1,696 | 6.0 min | 86.7% | 47 |
| ISP BWI Long Island MacArthur Airport – Baltimore/Washington International Thurgood Marshall Airport | 353 | 6.1 min | 77.8% | 47 |
| LAS DEN Harry Reid International Airport – Denver International Airport | 1,009 | 16.8 min | 65.9% | 42 |
| SMF LAS Sacramento International Airport – Harry Reid International Airport | 639 | 0.9 min | 97.4% | 39 |
| MTJ DEN Montrose Regional Airport – Denver International Airport | 316 | 9.2 min | 87.9% | 33 |
| LIH OAK Lihue Airport – Oakland San Francisco Bay Airport | 3,950 | -2.8 min | 100.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 37 | 37 | 91.9% | 0 |
| December 2024 | 45 | 45 | 82.2% | 0 |
| January 2025 | 22 | 21 | 85.7% | 1 |
| February 2025 | 41 | 41 | 65.9% | 0 |
| March 2025 | 54 | 54 | 85.2% | 0 |
| April 2025 | 33 | 33 | 81.8% | 0 |
| May 2025 | 29 | 29 | 82.8% | 0 |
| June 2025 | 19 | 19 | 57.9% | 0 |
| July 2025 | 17 | 16 | 25.0% | 1 |
| August 2025 | 65 | 64 | 67.2% | 1 |
| September 2025 | 73 | 73 | 71.2% | 0 |
| October 2025 | 65 | 64 | 84.4% | 1 |
| November 2025 | 30 | 30 | 96.7% | 0 |
| December 2025 | 30 | 30 | 83.3% | 0 |
| January 2026 | 57 | 55 | 78.2% | 2 |
| February 2026 | 62 | 60 | 71.7% | 2 |
| March 2026 | 36 | 36 | 80.6% | 0 |
| April 2026 | 6 | 6 | 100.0% | 0 |