AS499
AS499 (Alaska Airlines) is a multi-stop service on 3 routes, busiest Portland to Seattle. Of 431 departures recorded from October 2024 to July 2026, 94.4% left on time, according to the US BTS.
- On-time departures94.4%of 431 flights
- Average delay-0.3 min
- July 202631▲ 0.0%vs July 2025
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 6 | ▲ 20.0% |
| February | 2 | 17 | ▲ 750.0% |
| March | 3 | 31 | ▲ 933.3% |
| April | – | 21 | – |
| May | – | 19 | – |
| June | 18 | 30 | ▲ 66.7% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 29 | – | in progress |
| November | 30 | – | – |
| December | 16 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 60.0% | 83.3% | ▲ 38.9% |
| February | 100.0% | 94.1% | ▼ 5.9% |
| March | 100.0% | 93.6% | ▼ 6.5% |
| April | – | 100.0% | – |
| May | – | 94.4% | – |
| June | 94.4% | 100.0% | ▲ 5.9% |
| July | 96.8% | 93.6% | ▼ 3.3% |
| August | 93.3% | – | – |
| September | 93.3% | – | – |
| October | 93.1% | – | in progress |
| November | 96.6% | – | – |
| December | 100.0% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | 0 | – |
| May | – | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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% 427
- Cancelled 0.9% 4
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 SEA Portland International Airport – Seattle–Tacoma International Airport | 208 | -0.6 min | 95.3% | 340 |
| IAD SEA Washington Dulles International Airport – Seattle–Tacoma International Airport | 3,702 | 1.0 min | 90.6% | 86 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 31 | 30 | 93.3% | 1 |
| January 2025 | 5 | 5 | 60.0% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 3 | 3 | 100.0% | 0 |
| June 2025 | 18 | 18 | 94.4% | 0 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 31 | 30 | 93.3% | 1 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 29 | 29 | 93.1% | 0 |
| November 2025 | 30 | 29 | 96.6% | 1 |
| December 2025 | 16 | 16 | 100.0% | 0 |
| January 2026 | 6 | 6 | 83.3% | 0 |
| February 2026 | 17 | 17 | 94.1% | 0 |
| March 2026 | 31 | 31 | 93.6% | 0 |
| April 2026 | 21 | 21 | 100.0% | 0 |
| May 2026 | 19 | 18 | 94.4% | 1 |
| June 2026 | 30 | 30 | 100.0% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |