Flight Reliability
AS 587 · Alaska Airlines
Chicago → Seattle (ORD–SEA)
65
Usually Fine
WanderNerd Reliability Score
- 66%
- Arrive within 15 minutes
- 20 min
- Average arrival delay
- 0.5%
- Cancelled
- 2 min
- Median arrival delay
Based on 184 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
AS 587 arrived on time 74% of the time on Saturdays. On Sundays: 59%.
A bit behind the ORD–SEA route.
AS 587 arrived on time 66% of the time, versus 70% across the ORD–SEA route.
Lagging the Alaska Airlines network.
AS 587 arrived on time 66% of the time, versus 80% across the Alaska Airlines network.
Trending in the right direction.
AS 587 arrived on time 79% of the time over the last three months in the data, compared with 54% in the three months before that.
The breakdown
- Mon63%(27 flights)
- Tue65%(26 flights)
- Wed72%(25 flights)
- Thu67%(24 flights)
- Fri62%(26 flights)
- Sat74%(27 flights)
- Sun59%(27 flights)
83%
May
Oct 68% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| October 2025 | 68% | 28 |
| November 2025 | 59% | 29 |
| December 2025 | 45% | 29 |
| January 2026 | 60% | 30 |
| February 2026 | 79% | 28 |
| March 2026 | 77% | 17 |
| May 2026 | 83% | 12 |
- Departures on time
- 87%
- Diverted
- 0.5%
- Flights flown
- 182
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 184 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.