WN1837
WN1837 (Southwest Airlines) is a multi-stop service on 27 routes, busiest Dallas to Phoenix. Of 589 departures recorded from October 2024 to July 2026, 75.3% left on time, according to the US BTS.
- On-time departures75.3%of 589 flights
- Average delay12.4 min
- July 20264▼ 86.7%vs July 2025
- Cancelled0.9%
- Legs flown under this number27
according to the US BTS · Oct 12, 2024 → Jul 25, 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 | 26 | 35 | ▲ 34.6% |
| February | 38 | 43 | ▲ 13.2% |
| March | 22 | 33 | ▲ 50.0% |
| April | 27 | 27 | 0.0% |
| May | 30 | 26 | ▼ 13.3% |
| June | 30 | 7 | ▼ 76.7% |
| July | 30 | 4 | ▼ 86.7% |
| August | 23 | – | – |
| September | 21 | – | – |
| October | 30 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 203 | 175 | ▼ 13.8% |
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 | 92.3% | 94.1% | ▲ 2.0% |
| February | 86.8% | 93.0% | ▲ 7.1% |
| March | 72.7% | 56.3% | ▼ 22.7% |
| April | 73.1% | 63.0% | ▼ 13.8% |
| May | 66.7% | 50.0% | ▼ 25.0% |
| June | 63.3% | 57.1% | ▼ 9.8% |
| July | 70.0% | 75.0% | ▲ 7.1% |
| August | 43.5% | – | – |
| September | 38.1% | – | – |
| October | 93.3% | – | in progress |
| November | 89.7% | – | – |
| December | 83.9% | – | – |
| Year-to-date average (Jan–Jul) | 75.0% | 69.8% | ▼ 6.9% |
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 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 100.0% |
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 99.2% 584
- Cancelled 0.8% 5
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 25, 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 |
|---|---|---|---|---|
| DAL PHX Dallas Love Field – Phoenix Sky Harbor International Airport | 1,412 | 9.0 min | 86.4% | 82 |
| ONT SMF Ontario International Airport – Sacramento International Airport | 627 | 26.2 min | 61.7% | 60 |
| STL MDW St. Louis Lambert International Airport – Chicago Midway International Airport | 404 | -0.1 min | 92.6% | 55 |
| STL ATL St. Louis Lambert International Airport – Hartsfield Jackson Atlanta International Airport | 779 | 21.2 min | 50.0% | 50 |
| DAL BWI Dallas Love Field – Baltimore/Washington International Thurgood Marshall Airport | 1,942 | 18.6 min | 70.8% | 49 |
| OAK LAS Oakland San Francisco Bay Airport – Harry Reid International Airport | 654 | 0.4 min | 97.8% | 46 |
| DEN BNA Denver International Airport – Nashville International Airport | 1,628 | 29.3 min | 42.5% | 40 |
| MSY BWI Louis Armstrong New Orleans International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,607 | 21.9 min | 59.4% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 28 | 28 | 82.1% | 0 |
| December 2024 | 28 | 27 | 81.5% | 1 |
| January 2025 | 26 | 26 | 92.3% | 0 |
| February 2025 | 38 | 38 | 86.8% | 0 |
| March 2025 | 22 | 22 | 72.7% | 0 |
| April 2025 | 27 | 26 | 73.1% | 1 |
| May 2025 | 30 | 30 | 66.7% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 30 | 30 | 70.0% | 0 |
| August 2025 | 23 | 23 | 43.5% | 0 |
| September 2025 | 21 | 21 | 38.1% | 0 |
| October 2025 | 30 | 30 | 93.3% | 0 |
| November 2025 | 30 | 29 | 89.7% | 1 |
| December 2025 | 31 | 31 | 83.9% | 0 |
| January 2026 | 35 | 34 | 94.1% | 1 |
| February 2026 | 43 | 43 | 93.0% | 0 |
| March 2026 | 33 | 32 | 56.3% | 1 |
| April 2026 | 27 | 27 | 63.0% | 0 |
| May 2026 | 26 | 26 | 50.0% | 0 |
| June 2026 | 7 | 7 | 57.1% | 0 |
| July 2026 | 4 | 4 | 75.0% | 0 |