WN1828
WN1828 (Southwest Airlines) is a multi-stop service on 30 routes, busiest Nashville to Boston. Of 735 departures recorded from October 2024 to July 2026, 80.1% left on time, according to the US BTS.
- On-time departures80.1%of 735 flights
- Average delay11.5 min
- July 202634▲ 30.8%vs July 2025
- Cancelled0.3%
- Legs flown under this number30
according to the US BTS · Oct 13, 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 | 28 | 58 | ▲ 107.1% |
| February | 26 | 63 | ▲ 142.3% |
| March | 31 | 32 | ▲ 3.2% |
| April | 30 | 29 | ▼ 3.3% |
| May | 31 | 31 | 0.0% |
| June | 26 | 34 | ▲ 30.8% |
| July | 26 | 34 | ▲ 30.8% |
| August | 40 | – | – |
| September | 43 | – | – |
| October | 39 | – | in progress |
| November | 28 | – | – |
| December | 36 | – | – |
| Year to date (Jan–Jul) | 198 | 281 | ▲ 41.9% |
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 | 88.9% | 93.0% | ▲ 4.6% |
| February | 84.6% | 77.8% | ▼ 8.1% |
| March | 93.6% | 53.1% | ▼ 43.2% |
| April | 83.3% | 55.2% | ▼ 33.8% |
| May | 90.3% | 25.8% | ▼ 71.4% |
| June | 80.8% | 82.4% | ▲ 2.0% |
| July | 69.2% | 91.2% | ▲ 31.7% |
| August | 85.0% | – | – |
| September | 79.1% | – | – |
| October | 92.3% | – | in progress |
| November | 82.1% | – | – |
| December | 86.1% | – | – |
| Year-to-date average (Jan–Jul) | 84.4% | 68.3% | ▼ 19.0% |
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 | 1 | 1 | 0.0% |
| 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 | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
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 99.7% 733
- Cancelled 0.3% 2
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BNA BOS Nashville International Airport – Boston Logan International Airport | 1,514 | 11.5 min | 87.2% | 110 |
| SMF SNA Sacramento International Airport – John Wayne Orange County International Airport | 650 | 5.9 min | 86.2% | 58 |
| DEN CMH Denver International Airport – John Glenn Columbus International Airport | 1,853 | 31.6 min | 39.7% | 58 |
| BWI PIT Baltimore/Washington International Thurgood Marshall Airport – Pittsburgh International Airport | 338 | 5.8 min | 83.6% | 55 |
| EUG DEN Eugene Airport – Denver International Airport | 1,600 | 4.7 min | 94.0% | 50 |
| MCI PHX Kansas City International Airport – Phoenix Sky Harbor International Airport | 1,677 | -1.0 min | 100.0% | 42 |
| MCI DEN Kansas City International Airport – Denver International Airport | 855 | 13.4 min | 83.3% | 42 |
| MSP STL Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – St. Louis Lambert International Airport | 722 | 18.2 min | 79.4% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 81.8% | 0 |
| November 2024 | 29 | 29 | 96.6% | 0 |
| December 2024 | 30 | 30 | 76.7% | 0 |
| January 2025 | 28 | 27 | 88.9% | 1 |
| February 2025 | 26 | 26 | 84.6% | 0 |
| March 2025 | 31 | 31 | 93.6% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 90.3% | 0 |
| June 2025 | 26 | 26 | 80.8% | 0 |
| July 2025 | 26 | 26 | 69.2% | 0 |
| August 2025 | 40 | 40 | 85.0% | 0 |
| September 2025 | 43 | 43 | 79.1% | 0 |
| October 2025 | 39 | 39 | 92.3% | 0 |
| November 2025 | 28 | 28 | 82.1% | 0 |
| December 2025 | 36 | 36 | 86.1% | 0 |
| January 2026 | 58 | 57 | 93.0% | 1 |
| February 2026 | 63 | 63 | 77.8% | 0 |
| March 2026 | 32 | 32 | 53.1% | 0 |
| April 2026 | 29 | 29 | 55.2% | 0 |
| May 2026 | 31 | 31 | 25.8% | 0 |
| June 2026 | 34 | 34 | 82.4% | 0 |
| July 2026 | 34 | 34 | 91.2% | 0 |