Flight profile · Alaska Airlines
AS459
Boston (BOS) to Seattle (SEA) · scheduled 7:00 AM – 10:38 AM
How AS459 performs
999 operations, 2023-07-01 to 2026-06-30.
Source: US DOT Bureau of Transportation Statistics · 999 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS459 | 75.3% | 0.70% | -4 min | 3.2% | 999 |
| Alaska Airlines on BOS → SEA | 74.3% | 1.03% | -5 min | 6.1% | 3,579 |
| All BOS → SEA flights | 75.9% | 0.95% | -6 min | 6.9% | 7,588 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS459 run worse on particular days?
Monday is historically the most reliable day and Friday the least, a gap of 7.0 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Data and methodology
Calculated by FlyerIntel from 999 records of AS459 operating BOS → SEA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.