Flight Reliability
AS 540 · Alaska Airlines
Portland → Austin (PDX–AUS)
92
Nerd Approved
WanderNerd Reliability Score
- 87%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.8%
- Cancelled
- 1 min early
- Median arrival delay
Based on 236 historical flights. Data through May 2026.
What the data says
Thursday is the weak spot.
AS 540 arrived on time 94% of the time on Tuesdays. On Thursdays: 82%.
A bit ahead of the PDX–AUS route.
AS 540 arrived on time 87% of the time, versus 84% across the PDX–AUS route.
A bit ahead of the Alaska Airlines network.
AS 540 arrived on time 87% of the time, versus 80% across the Alaska Airlines network.
Ticking up lately.
AS 540 arrived on time 90% of the time over the last three months in the data, compared with 86% in the three months before that.
The breakdown
- Mon88%(34 flights)
- Tue94%(34 flights)
- Wed91%(34 flights)
- Thu82%(34 flights)
- Fri85%(33 flights)
- Sat85%(33 flights)
- Sun84%(32 flights)
90%
May
Oct 89% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| October 2025 | 89% | 27 |
| November 2025 | 80% | 30 |
| December 2025 | 83% | 29 |
| January 2026 | 86% | 29 |
| February 2026 | 89% | 28 |
| March 2026 | 93% | 30 |
| April 2026 | 87% | 30 |
| May 2026 | 90% | 31 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 234
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 236 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.