Skip to content
WanderNerd
Check a flight

Flight Reliability

AS 526 · Alaska Airlines

Portland → San Francisco (PDX–SFO)96% of its flights flew this route. The rest (SEA–AUS) are included in these numbers.

73
Usually Fine
WanderNerd Reliability Score
70%
Arrive within 15 minutes
14 min
Average arrival delay
0.7%
Cancelled
3 min
Median arrival delay

Based on 292 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

AS 526 departing between 3–6 PM arrived on time 82% of the time, versus 69% between 6–9 AM.

Thursdays have been rough.

AS 526 arrived on time 74% of the time on Sundays and just 56% on Thursdays. That gap is worth planning around.

A bit behind the PDX–SFO route.

AS 526 arrived on time 70% of the time, versus 76% across the PDX–SFO route.

Lagging the Alaska Airlines network.

AS 526 arrived on time 70% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon74%(42 flights)
  • Tue72%(43 flights)
  • Wed68%(41 flights)
  • Thu56%(39 flights)
  • Fri71%(41 flights)
  • Sat71%(41 flights)
  • Sun74%(43 flights)
On-time by departure window
  • 6–9 AM69%(279 flights)
  • 3–6 PM82%(11 flights)
On-time trend by month
23%
May

Jun 76% → May 23% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202576%29
August 202563%19
November 202579%29
December 202566%29
January 202677%30
February 202686%28
March 202694%31
April 202653%30
May 202623%31
Departures on time
77%
Diverted
0%
Flights flown
290
Months covered
11

Same route, other flights

Keep nerding

Based on 292 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.