Flight profile · Alaska Airlines
AS642
Seattle (SEA) to Denver (DEN) · scheduled 8:20 PM – 11:59 PM
How AS642 performs
662 operations, 2023-07-01 to 2026-06-09.
AS642 arrived on time 76.0% of the time, against 78.3% for all SEA → DEN flights — this specific departure is 2.3 percentage points worse than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 662 operations between 2023-07-01 to 2026-06-09
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS642 | 76.0% | 0.30% | -2 min | 5.0% | 662 |
| Alaska Airlines on SEA → DEN | 75.5% | 0.74% | -2 min | 6.2% | 4,733 |
| All SEA → DEN flights | 78.3% | 0.77% | -5 min | 6.5% | 19,613 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-09
Other routes AS642 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.
Because the same number has served different journeys, the statistics above describe only the route AS642 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 662 records of AS642 operating SEA → DEN, 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.