Flight Reliability
AS 278 · Alaska Airlines
Portland → Los Angeles (PDX–LAX)
95
Nerd Approved
WanderNerd Reliability Score
- 88%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 0.3%
- Cancelled
- 7 min early
- Median arrival delay
Based on 341 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
AS 278 arrived on time 96% of the time on Tuesdays and just 80% on Fridays. That gap is worth planning around.
Better than the Alaska Airlines network average.
AS 278 arrived on time 88% of the time, versus 80% across the Alaska Airlines network.
It basically never cancels.
Out of 341 scheduled flights, only 0.3% were cancelled.
The breakdown
- Mon92%(52 flights)
- Tue96%(51 flights)
- Wed90%(52 flights)
- Thu82%(51 flights)
- Fri80%(50 flights)
- Sat92%(36 flights)
- Sun83%(48 flights)
90%
May
Jun 69% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 69% | 26 |
| July 2025 | 89% | 27 |
| August 2025 | 96% | 28 |
| September 2025 | 90% | 30 |
| October 2025 | 87% | 30 |
| November 2025 | 89% | 28 |
| December 2025 | 84% | 31 |
| January 2026 | 86% | 29 |
| February 2026 | 96% | 28 |
| March 2026 | 86% | 28 |
| April 2026 | 92% | 26 |
| May 2026 | 90% | 29 |
- Departures on time
- 87%
- Diverted
- 0%
- Flights flown
- 340
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 341 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.