AS478
AS478 (Alaska Airlines) is a multi-stop service on 4 routes, busiest Seattle to Las Vegas. Of 406 departures recorded from December 2024 to July 2026, 72.7% left on time, according to the US BTS.
- On-time departures72.7%of 406 flights
- Average delay11.1 min
- July 202631▲ 3.3%vs July 2025
- Cancelled0.7%
- Legs flown under this number4
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 24 | – |
| February | – | 24 | – |
| March | – | 31 | – |
| April | 1 | 29 | ▲ 2,800.0% |
| May | 17 | 23 | ▲ 35.3% |
| June | 30 | 26 | ▼ 13.3% |
| July | 30 | 31 | ▲ 3.3% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 28 | – | in progress |
| November | 20 | – | – |
| December | 31 | – | – |
according to the US BTS · December 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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 87.5% | – |
| February | – | 66.7% | – |
| March | – | 74.2% | – |
| April | 0.0% | 62.1% | – |
| May | 94.1% | 69.6% | ▼ 26.1% |
| June | 73.3% | 73.1% | ▼ 0.3% |
| July | 65.5% | 71.0% | ▲ 8.3% |
| August | 73.3% | – | – |
| September | 70.0% | – | – |
| October | 85.2% | – | in progress |
| November | 63.2% | – | – |
| December | 71.0% | – | – |
according to the US BTS · December 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · December 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
according to the US BTS · December 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 99.3% 403
- Cancelled 0.7% 3
Share of all recorded flights in the period, all legs. · Dec 3, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA LAS Seattle–Tacoma International Airport – Harry Reid International Airport | 1,395 | 12.2 min | 71.3% | 376 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| December 2024 | 1 | 1 | 100.0% | 0 |
| April 2025 | 1 | 1 | 0.0% | 0 |
| May 2025 | 17 | 17 | 94.1% | 0 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 30 | 29 | 65.5% | 1 |
| August 2025 | 30 | 30 | 73.3% | 0 |
| September 2025 | 30 | 30 | 70.0% | 0 |
| October 2025 | 28 | 27 | 85.2% | 1 |
| November 2025 | 20 | 19 | 63.2% | 1 |
| December 2025 | 31 | 31 | 71.0% | 0 |
| January 2026 | 24 | 24 | 87.5% | 0 |
| February 2026 | 24 | 24 | 66.7% | 0 |
| March 2026 | 31 | 31 | 74.2% | 0 |
| April 2026 | 29 | 29 | 62.1% | 0 |
| May 2026 | 23 | 23 | 69.6% | 0 |
| June 2026 | 26 | 26 | 73.1% | 0 |
| July 2026 | 31 | 31 | 71.0% | 0 |