Flight profile · Alaska Airlines
AS438
Seattle (SEA) to Houston (IAH) · scheduled 10:30 AM – 6:10 PM
How AS438 performs
1,090 operations, 2023-07-01 to 2026-06-30.
AS438 arrived on time 71.1% of the time, against 79.3% for all SEA → IAH flights — this specific departure is 8.2 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 2.8 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,090 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS438 | 71.1% | 1.10% | 1 min | 5.5% | 1,090 |
| Alaska Airlines on SEA → IAH | 73.9% | 1.22% | -1 min | 4.2% | 2,627 |
| All SEA → IAH flights | 79.3% | 1.24% | -5 min | 4.8% | 6,298 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS438 run worse on particular days?
Monday is historically the most reliable day and Friday the least, a gap of 11.5 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 1,090 records of AS438 operating SEA → IAH, 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.