No delays reported for AS 459 (BOS → SEA) as of 6:43 PM ET. It arrived on time 75% of the time in June-August 2026. When it was late, the average delay was 44 minutes. None were cancelled. Right now there are no reported delays at BOS, SEA.
Looks on time
Next leg BOS → SEA, scheduled 7:03 AM local time. No delays at BOS right now.
Cancellation risk: Low 0% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Alaska Airlines for official times.
Before you fly
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| BOS → SEA Boston, MA to Seattle, WA | 7:03 AM → 10:26 AM | 75% |
Local times. Schedules change; check your booking.
How reliable is AS 459?
| Arrived on time (within 15 min) | 75% |
| Average delay when late | 44 min |
| Cancelled | 0% |
| Diverted | 0% |
| Flights tracked | 92 |
Best and worst days to fly AS 459
AS 459 was most reliable on Wednesdays (100% on time) and least reliable on Sundays (62%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Alaska Airlines to the Department of Transportation.
Other flights BOS → SEA
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Alaska Airlines app.
Alaska Airlines delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is AS 459 delayed today?
Right now there are no reported delays at BOS, SEA. Checked 6:43 PM ET. For this flight's gate and exact status, check the Alaska Airlines app.
Is AS 459 usually on time?
AS 459 arrived within 15 minutes of schedule 75% of the time in June-August 2026, with an average delay of 44 minutes when late.
How often is AS 459 cancelled?
0% of AS 459 flights were cancelled in June-August 2026.