Flight profile · Alaska Airlines
AS637
Phoenix (PHX) to Seattle (SEA) · scheduled 11:00 AM – 1:59 PM
How AS637 performs
962 operations, 2023-07-01 to 2026-06-30.
AS637 arrived on time 88.2% of the time, against 82.8% for all PHX → SEA flights — this specific departure is 5.4 percentage points better than the route as a whole. Against Alaska Airlines’s own flights on this route it is 5.1 points better.
Source: US DOT Bureau of Transportation Statistics · 962 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS637 | 88.2% | 0.83% | -6 min | 3.3% | 962 |
| Alaska Airlines on PHX → SEA | 83.1% | 0.92% | -5 min | 3.6% | 8,938 |
| All PHX → SEA flights | 82.8% | 0.58% | -6 min | 4.3% | 21,737 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS637 run worse on particular days?
Saturday is historically the most reliable day and Sunday the least, a gap of 5.1 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 962 records of AS637 operating PHX → 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.