Flight Reliability
AS 1239 · Alaska Airlines
Portland → Phoenix (PDX–PHX)
92
Nerd Approved
WanderNerd Reliability Score
- 90%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 1.4%
- Cancelled
- 2 min early
- Median arrival delay
Based on 146 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
AS 1239 arrived on time 95% of the time on Tuesdays and just 80% on Wednesdays. That gap is worth planning around.
Better than the PDX–PHX route average.
AS 1239 arrived on time 90% of the time, versus 81% across the PDX–PHX route.
Better than the Alaska Airlines network average.
AS 1239 arrived on time 90% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon91%(21 flights)
- Tue95%(21 flights)
- Wed80%(20 flights)
- Thu90%(20 flights)
- Fri95%(21 flights)
- Sat90%(20 flights)
- Sun86%(21 flights)
79%
Oct
Jun 90% → Oct 79% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 30 |
| July 2025 | 90% | 31 |
| August 2025 | 90% | 30 |
| September 2025 | 97% | 29 |
| October 2025 | 79% | 24 |
- Departures on time
- 93%
- Diverted
- 0%
- Flights flown
- 144
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 146 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.