Flight profile · Alaska Airlines
AS473
St. Louis (STL) to Seattle (SEA) · scheduled 7:00 AM – 9:25 AM
How AS473 performs
910 operations, 2023-07-01 to 2026-06-30.
AS473 arrived on time 88.8% of the time, against 79.8% for all STL → SEA flights — this specific departure is 9.0 percentage points better than the route as a whole. Against Alaska Airlines’s own flights on this route it is 7.0 points better.
Source: US DOT Bureau of Transportation Statistics · 910 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS473 | 88.8% | 0.66% | -10 min | 1.5% | 910 |
| Alaska Airlines on STL → SEA | 81.9% | 0.98% | -6 min | 3.5% | 2,348 |
| All STL → SEA flights | 79.8% | 0.89% | -5 min | 3.7% | 2,594 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS473 run worse on particular days?
Friday is historically the most reliable day and Sunday the least, a gap of 8.2 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.
Other routes AS473 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 |
|---|---|---|---|
| PIT→SEA Pittsburgh to Seattle | 2026-02-12 – 2026-02-12 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route AS473 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 910 records of AS473 operating STL → 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.