WN1550
WN1550 (Southwest Airlines) is a multi-stop service on 39 routes, busiest Las Vegas to Nashville. Of 674 departures recorded from October 2024 to July 2026, 76.9% left on time, according to the US BTS.
- On-time departures76.9%of 674 flights
- Average delay11.1 min
- July 20268▼ 73.3%vs July 2025
- Cancelled1.0%
- 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 | 46 | 54 | ▲ 17.4% |
| February | 57 | 41 | ▼ 28.1% |
| March | 23 | 33 | ▲ 43.5% |
| April | 18 | 40 | ▲ 122.2% |
| May | 16 | 44 | ▲ 175.0% |
| June | 29 | 13 | ▼ 55.2% |
| July | 30 | 8 | ▼ 73.3% |
| August | 19 | – | – |
| September | 17 | – | – |
| October | 37 | – | in progress |
| November | 31 | – | – |
| December | 40 | – | – |
| Year to date (Jan–Jul) | 219 | 233 | ▲ 6.4% |
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 | 84.8% | 81.1% | ▼ 4.3% |
| February | 71.4% | 97.6% | ▲ 36.6% |
| March | 91.3% | 51.6% | ▼ 43.5% |
| April | 100.0% | 90.0% | ▼ 10.0% |
| May | 87.5% | 93.2% | ▲ 6.5% |
| June | 58.6% | 100.0% | ▲ 70.6% |
| July | 60.0% | 50.0% | ▼ 16.7% |
| August | 63.2% | – | – |
| September | 58.8% | – | – |
| October | 77.8% | – | in progress |
| November | 67.7% | – | – |
| December | 45.0% | – | – |
| Year-to-date average (Jan–Jul) | 79.1% | 80.5% | ▲ 1.8% |
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 | 1 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 2 | – |
| April | 2 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 3 | 0.0% |
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 99.0% 667
- Cancelled 1.0% 7
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 26, 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 |
|---|---|---|---|---|
| LAS BNA Harry Reid International Airport – Nashville International Airport | 2,549 | 12.7 min | 79.7% | 60 |
| DEN OMA Denver International Airport – Eppley Airfield | 758 | -0.2 min | 93.1% | 58 |
| PIT BWI Pittsburgh International Airport – Baltimore/Washington International Thurgood Marshall Airport | 338 | -1.6 min | 98.0% | 50 |
| BUR RNO Hollywood Burbank/Bob Hope Airport – Reno Tahoe International Airport | 602 | 12.1 min | 71.4% | 42 |
| OMA BNA Eppley Airfield – Nashville International Airport | 985 | 2.5 min | 87.5% | 33 |
| IND PHX Indianapolis International Airport – Phoenix Sky Harbor International Airport | 2,390 | 3.4 min | 87.9% | 33 |
| MIA DEN Miami International Airport – Denver International Airport | 2,749 | 38.0 min | 56.3% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 94.4% | 0 |
| November 2024 | 28 | 28 | 75.0% | 0 |
| December 2024 | 32 | 32 | 87.5% | 0 |
| January 2025 | 46 | 46 | 84.8% | 0 |
| February 2025 | 57 | 56 | 71.4% | 1 |
| March 2025 | 23 | 23 | 91.3% | 0 |
| April 2025 | 18 | 16 | 100.0% | 2 |
| May 2025 | 16 | 16 | 87.5% | 0 |
| June 2025 | 29 | 29 | 58.6% | 0 |
| July 2025 | 30 | 30 | 60.0% | 0 |
| August 2025 | 19 | 19 | 63.2% | 0 |
| September 2025 | 17 | 17 | 58.8% | 0 |
| October 2025 | 37 | 36 | 77.8% | 1 |
| November 2025 | 31 | 31 | 67.7% | 0 |
| December 2025 | 40 | 40 | 45.0% | 0 |
| January 2026 | 54 | 53 | 81.1% | 1 |
| February 2026 | 41 | 41 | 97.6% | 0 |
| March 2026 | 33 | 31 | 51.6% | 2 |
| April 2026 | 40 | 40 | 90.0% | 0 |
| May 2026 | 44 | 44 | 93.2% | 0 |
| June 2026 | 13 | 13 | 100.0% | 0 |
| July 2026 | 8 | 8 | 50.0% | 0 |