WN4185
WN4185 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Reno to Denver. Of 557 departures recorded from October 2024 to July 2026, 76.5% left on time, according to the US BTS.
- On-time departures76.5%of 557 flights
- Average delay11.8 min
- July 202626▲ 18.2%vs July 2025
- Cancelled0.5%
- Legs flown under this number22
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 | 10 | 38 | ▲ 280.0% |
| February | 18 | 53 | ▲ 194.4% |
| March | 30 | 20 | ▼ 33.3% |
| April | 30 | 15 | ▼ 50.0% |
| May | 30 | 18 | ▼ 40.0% |
| June | 22 | 17 | ▼ 22.7% |
| July | 22 | 26 | ▲ 18.2% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 28 | – | – |
| December | 38 | – | – |
| Year to date (Jan–Jul) | 162 | 187 | ▲ 15.4% |
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 | 90.0% | 89.5% | ▼ 0.6% |
| February | 100.0% | 75.5% | ▼ 24.5% |
| March | 90.0% | 55.0% | ▼ 38.9% |
| April | 80.0% | 40.0% | ▼ 50.0% |
| May | 70.0% | 62.5% | ▼ 10.7% |
| June | 54.6% | 29.4% | ▼ 46.1% |
| July | 59.1% | 72.0% | ▲ 21.8% |
| August | 96.6% | – | – |
| September | 96.7% | – | – |
| October | 71.0% | – | in progress |
| November | 96.4% | – | – |
| December | 92.1% | – | – |
| Year-to-date average (Jan–Jul) | 77.7% | 60.6% | ▼ 22.0% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 2 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 3 |
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 99.5% 554
- Cancelled 0.5% 3
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 88.2% | 0 |
| November 2024 | 18 | 18 | 77.8% | 0 |
| December 2024 | 17 | 17 | 35.3% | 0 |
| January 2025 | 10 | 10 | 90.0% | 0 |
| February 2025 | 18 | 18 | 100.0% | 0 |
| March 2025 | 30 | 30 | 90.0% | 0 |
| April 2025 | 30 | 30 | 80.0% | 0 |
| May 2025 | 30 | 30 | 70.0% | 0 |
| June 2025 | 22 | 22 | 54.6% | 0 |
| July 2025 | 22 | 22 | 59.1% | 0 |
| August 2025 | 29 | 29 | 96.6% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 71.0% | 0 |
| November 2025 | 28 | 28 | 96.4% | 0 |
| December 2025 | 38 | 38 | 92.1% | 0 |
| January 2026 | 38 | 38 | 89.5% | 0 |
| February 2026 | 53 | 53 | 75.5% | 0 |
| March 2026 | 20 | 20 | 55.0% | 0 |
| April 2026 | 15 | 15 | 40.0% | 0 |
| May 2026 | 18 | 16 | 62.5% | 2 |
| June 2026 | 17 | 17 | 29.4% | 0 |
| July 2026 | 26 | 25 | 72.0% | 1 |