Flight profile · Alaska Airlines
AS329
Chicago (ORD) to Seattle (SEA) · scheduled 10:00 AM – 12:34 PM
How AS329 performs
881 operations, 2023-07-01 to 2026-06-30.
AS329 arrived on time 72.6% of the time, against 74.3% for all ORD → SEA flights — this specific departure is 1.8 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 1.6 points better.
Source: US DOT Bureau of Transportation Statistics · 881 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS329 | 72.6% | 1.48% | -1 min | 6.6% | 881 |
| Alaska Airlines on ORD → SEA | 71.0% | 1.02% | -2 min | 8.5% | 5,476 |
| All ORD → SEA flights | 74.3% | 0.98% | -4 min | 7.8% | 15,703 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS329 run worse on particular days?
Sunday is historically the most reliable day and Thursday the least, a gap of 10.3 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 AS329 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 AS329 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 881 records of AS329 operating ORD → 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.