WN1597
WN1597 (Southwest Airlines) is a multi-stop service on 32 routes, busiest Las Vegas to Denver. Of 707 departures recorded from October 2024 to July 2026, 80.5% left on time, according to the US BTS.
- On-time departures80.5%of 707 flights
- Average delay8.9 min
- July 20267▼ 77.4%vs July 2025
- Cancelled0.4%
- Legs flown under this number32
according to the US BTS · Oct 12, 2024 → Jul 26, 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 | 32 | 12 | ▼ 62.5% |
| February | 32 | 19 | ▼ 40.6% |
| March | 37 | 41 | ▲ 10.8% |
| April | 40 | 49 | ▲ 22.5% |
| May | 39 | 53 | ▲ 35.9% |
| June | 32 | 31 | ▼ 3.1% |
| July | 31 | 7 | ▼ 77.4% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 52 | – | in progress |
| November | 38 | – | – |
| December | 20 | – | – |
| Year to date (Jan–Jul) | 243 | 212 | ▼ 12.8% |
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 | 87.5% | 66.7% | ▼ 23.8% |
| February | 75.0% | 52.6% | ▼ 29.8% |
| March | 94.6% | 75.6% | ▼ 20.1% |
| April | 72.5% | 87.8% | ▲ 21.0% |
| May | 71.8% | 96.2% | ▲ 34.0% |
| June | 78.1% | 45.2% | ▼ 42.2% |
| July | 77.4% | 71.4% | ▼ 7.7% |
| August | 83.9% | – | – |
| September | 83.3% | – | – |
| October | 92.3% | – | in progress |
| November | 76.3% | – | – |
| December | 80.0% | – | – |
| Year-to-date average (Jan–Jul) | 79.6% | 70.8% | ▼ 11.0% |
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 | 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) | 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 99.6% 704
- Cancelled 0.4% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 26, 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 |
|---|---|---|---|---|
| LAS DEN Harry Reid International Airport – Denver International Airport | 1,009 | 10.3 min | 83.8% | 74 |
| BWI BOS Baltimore/Washington International Thurgood Marshall Airport – Boston Logan International Airport | 594 | 11.9 min | 78.7% | 61 |
| MCI LAX Kansas City International Airport – Los Angeles International Airport | 2,190 | 18.5 min | 63.8% | 58 |
| HOU ABQ William P. Hobby Airport – Albuquerque International Sunport | 1,221 | 5.4 min | 84.5% | 58 |
| OGG OAK Kahului International Airport – Oakland San Francisco Bay Airport | 3,777 | -4.8 min | 100.0% | 57 |
| DEN SAT Denver International Airport – San Antonio International Airport | 1,280 | 10.6 min | 71.9% | 57 |
| DEN MCO Denver International Airport – Orlando International Airport | 2,486 | 20.0 min | 44.1% | 34 |
| MSY AUS Louis Armstrong New Orleans International Airport – Austin Bergstrom International Airport | 712 | 26.1 min | 72.7% | 33 |
| IND ATL Indianapolis International Airport – Hartsfield Jackson Atlanta International Airport | 696 | -0.8 min | 97.0% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 100.0% | 0 |
| November 2024 | 30 | 29 | 89.7% | 1 |
| December 2024 | 45 | 43 | 83.7% | 2 |
| January 2025 | 32 | 32 | 87.5% | 0 |
| February 2025 | 32 | 32 | 75.0% | 0 |
| March 2025 | 37 | 37 | 94.6% | 0 |
| April 2025 | 40 | 40 | 72.5% | 0 |
| May 2025 | 39 | 39 | 71.8% | 0 |
| June 2025 | 32 | 32 | 78.1% | 0 |
| July 2025 | 31 | 31 | 77.4% | 0 |
| August 2025 | 31 | 31 | 83.9% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 52 | 52 | 92.3% | 0 |
| November 2025 | 38 | 38 | 76.3% | 0 |
| December 2025 | 20 | 20 | 80.0% | 0 |
| January 2026 | 12 | 12 | 66.7% | 0 |
| February 2026 | 19 | 19 | 52.6% | 0 |
| March 2026 | 41 | 41 | 75.6% | 0 |
| April 2026 | 49 | 49 | 87.8% | 0 |
| May 2026 | 53 | 53 | 96.2% | 0 |
| June 2026 | 31 | 31 | 45.2% | 0 |
| July 2026 | 7 | 7 | 71.4% | 0 |