Flight profile · Alaska Airlines
AS587
Chicago (ORD) to Seattle (SEA) · scheduled 8:00 AM – 10:40 AM
How AS587 performs
368 operations, 2023-07-01 to 2026-06-30.
Source: US DOT Bureau of Transportation Statistics · 368 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS587 | 73.9% | 0.82% | -4 min | 8.5% | 368 |
| 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
Other routes AS587 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 |
|---|---|---|---|
| SEA→LAS Seattle to Las Vegas | 2025-01-06 – 2025-01-06 | 1 | — |
| SEA→MCO Seattle to Orlando | 2024-12-03 – 2024-12-03 | 1 | — |
| ORD→SFO Chicago to San Francisco | 2024-10-27 – 2024-11-17 | 4 | — |
| DEN→PDX Denver to Portland | 2024-06-15 – 2024-08-17 | 10 | — |
| SEA→SAN Seattle to San Diego | 2024-04-01 – 2024-04-05 | 5 | — |
| DAL→SEA Dallas to Seattle | 2024-03-14 – 2024-03-14 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route AS587 currently operates. Blending them would produce an average of two different flights.
Why AS587 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for AS587 on ORD → SEA. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on ORD → SEA
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL2041 | Delta Air Lines | 81.1% | 7 min early | 754 |
| UA2278 | United Airlines | 80.1% | 7 min early | 646 |
| AS407 | Alaska Airlines | 75.2% | 2 min early | 693 |
| AS329 | Alaska Airlines | 72.6% | 1 min early | 881 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 368 records of AS587 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.