Flight profile · Alaska Airlines
AS477
Seattle (SEA) to Newark (EWR) · scheduled 10:09 AM – 6:29 PM
How AS477 performs
452 operations, 2023-07-01 to 2026-06-30.
AS477 arrived on time 68.6% of the time, against 79.5% for all SEA → EWR flights — this specific departure is 10.8 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 9.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 452 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS477 | 68.6% | 2.43% | -2 min | 13.5% | 452 |
| Alaska Airlines on SEA → EWR | 78.2% | 1.78% | -9 min | 6.6% | 3,205 |
| All SEA → EWR flights | 79.5% | 1.58% | -9 min | 7.5% | 6,154 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
Other routes AS477 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| EWR→SEA Newark to Seattle | 2023-07-01 – 2025-06-11 | 662 | 65.0% |
Because the same number has served different journeys, the statistics above describe only the route AS477 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 452 records of AS477 operating SEA → EWR, 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.