WN4818
WN4818 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Portland to Las Vegas. Of 179 departures recorded from October 2024 to July 2026, 79.9% left on time, according to the US BTS.
- On-time departures79.9%of 179 flights
- Average delay11.9 min
- July 202626
- Cancelled0.0%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods10 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 31 | ▲ 520.0% |
| February | – | 36 | – |
| March | – | 5 | – |
| April | 3 | – | – |
| May | 3 | – | – |
| June | 1 | 24 | ▲ 2,300.0% |
| July | – | 26 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods10 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 90.3% | ▼ 9.7% |
| February | – | 77.8% | – |
| March | – | 100.0% | – |
| April | 100.0% | – | – |
| May | 100.0% | – | – |
| June | 100.0% | 50.0% | ▼ 50.0% |
| July | – | 53.9% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | – | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods10 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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 100.0% 179
- Cancelled 0.0% 0
Share of all recorded flights in the period, all legs. · Oct 14, 2024 → Jul 29, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PDX LAS Portland International Airport – Harry Reid International Airport | 1,227 | 5.9 min | 84.5% | 58 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 7 | 7 | 100.0% | 0 |
| November 2024 | 13 | 13 | 100.0% | 0 |
| December 2024 | 24 | 24 | 95.8% | 0 |
| January 2025 | 5 | 5 | 100.0% | 0 |
| April 2025 | 3 | 3 | 100.0% | 0 |
| May 2025 | 3 | 3 | 100.0% | 0 |
| June 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| January 2026 | 31 | 31 | 90.3% | 0 |
| February 2026 | 36 | 36 | 77.8% | 0 |
| March 2026 | 5 | 5 | 100.0% | 0 |
| June 2026 | 24 | 24 | 50.0% | 0 |
| July 2026 | 26 | 26 | 53.9% | 0 |