Flight Reliability
AS 581 · Alaska Airlines
Portland → Los Angeles (PDX–LAX)99% of its flights flew this route. The rest (IAD–SEA, PHX–PAE) are included in these numbers.
93
Nerd Approved
WanderNerd Reliability Score
- 90%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 1.4%
- Cancelled
- 0 min
- Median arrival delay
Based on 217 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
AS 581 arrived on time 97% of the time on Saturdays. On Sundays: 84%.
Better than the Alaska Airlines network average.
AS 581 arrived on time 90% of the time, versus 80% across the Alaska Airlines network.
Ticking up lately.
AS 581 arrived on time 92% of the time over the last three months in the data, compared with 86% in the three months before that.
The breakdown
- Mon87%(31 flights)
- Tue90%(31 flights)
- Wed88%(32 flights)
- Thu93%(30 flights)
- Fri93%(30 flights)
- Sat97%(29 flights)
- Sun84%(31 flights)
- 6–9 AM90%(212 flights)
- 9 AM–12 PM—(1 flights)
- 6–9 PM—(1 flights)
97%
May
Nov 96% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 96% | 28 |
| December 2025 | 87% | 30 |
| January 2026 | 87% | 30 |
| February 2026 | 85% | 27 |
| March 2026 | 87% | 30 |
| April 2026 | 93% | 30 |
| May 2026 | 97% | 31 |
- Departures on time
- 95%
- Diverted
- 0%
- Flights flown
- 214
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 217 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.