AS531
AS531 (Alaska Airlines) is a multi-stop service on 3 routes, busiest Portland to Las Vegas. Of 336 departures recorded from October 2024 to July 2026, 81.4% left on time, according to the US BTS.
- On-time departures81.4%of 336 flights
- Average delay9.0 min
- July 202631
- Cancelled0.9%
- Legs flown under this number3
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods13 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 31 | ▲ 675.0% |
| February | – | 28 | – |
| March | – | 29 | – |
| April | – | 21 | – |
| May | 17 | 19 | ▲ 11.8% |
| June | 11 | 30 | ▲ 172.7% |
| July | – | 31 | – |
| August | – | – | – |
| September | – | – | – |
| October | 6 | – | in progress |
| November | 29 | – | – |
| December | 30 | – | – |
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 periods13 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 75.0% | 86.7% | ▲ 15.6% |
| February | – | 82.1% | – |
| March | – | 89.3% | – |
| April | – | 90.5% | – |
| May | 70.6% | 84.2% | ▲ 19.3% |
| June | 81.8% | 73.3% | ▼ 10.4% |
| July | – | 83.9% | – |
| August | – | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | 82.8% | – | – |
| December | 76.7% | – | – |
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 periods13 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | – | 0 | – |
| March | – | 1 | – |
| April | – | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
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 99.1% 333
- Cancelled 0.9% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PDX LAS Portland International Airport – Harry Reid International Airport | 1,227 | 7.4 min | 83.3% | 254 |
| AUS SAN Austin Bergstrom International Airport – San Diego International Airport | 1,871 | 14.3 min | 75.5% | 54 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 76.5% | 0 |
| November 2024 | 20 | 20 | 85.0% | 0 |
| December 2024 | 13 | 12 | 58.3% | 1 |
| January 2025 | 4 | 4 | 75.0% | 0 |
| May 2025 | 17 | 17 | 70.6% | 0 |
| June 2025 | 11 | 11 | 81.8% | 0 |
| October 2025 | 6 | 6 | 100.0% | 0 |
| November 2025 | 29 | 29 | 82.8% | 0 |
| December 2025 | 30 | 30 | 76.7% | 0 |
| January 2026 | 31 | 30 | 86.7% | 1 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 29 | 28 | 89.3% | 1 |
| April 2026 | 21 | 21 | 90.5% | 0 |
| May 2026 | 19 | 19 | 84.2% | 0 |
| June 2026 | 30 | 30 | 73.3% | 0 |
| July 2026 | 31 | 31 | 83.9% | 0 |