Flight Reliability
AS 559 · Alaska Airlines
Portland → Burbank (PDX–BUR)95% of its flights flew this route. The rest (SFO–SEA) are included in these numbers.
- 87%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 0%
- Cancelled
- 11 min early
- Median arrival delay
Based on 209 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
AS 559 departing between 3–6 PM arrived on time 89% of the time, versus 67% between 6–9 PM.
Sunday scaries are real for this one.
AS 559 arrived on time 93% of the time on Wednesdays and just 77% on Sundays. That gap is worth planning around.
A bit ahead of the Alaska Airlines network.
AS 559 arrived on time 87% of the time, versus 80% across the Alaska Airlines network.
It basically never cancels.
Out of 209 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon88%(33 flights)
- Tue89%(28 flights)
- Wed93%(29 flights)
- Thu87%(31 flights)
- Fri87%(30 flights)
- Sat88%(24 flights)
- Sun77%(34 flights)
- 3–6 PM89%(188 flights)
- 6–9 PM67%(21 flights)
Jun 46% → May 93% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 46% | 11 |
| November 2025 | 83% | 29 |
| December 2025 | 87% | 30 |
| January 2026 | 100% | 31 |
| February 2026 | 86% | 21 |
| March 2026 | 83% | 24 |
| April 2026 | 86% | 29 |
| May 2026 | 93% | 29 |
- Departures on time
- 86%
- Diverted
- 0%
- Flights flown
- 209
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 209 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.