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Flight Reliability

AS 525 · Alaska Airlines

San Francisco → Portland (SFO–PDX)85% of its flights flew this route. The rest (DEN–SEA) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
84%
Arrive within 15 minutes
3 min
Average arrival delay
0.6%
Cancelled
6 min early
Median arrival delay

Based on 337 historical flights. Data through May 2026.

What the data says

6–9 PM has a slight edge.

Departures between 6–9 PM arrived on time 85% of the time, against 79% between 9 AM–12 PM.

Sunday scaries are real for this one.

AS 525 arrived on time 91% of the time on Wednesdays and just 76% on Sundays. That gap is worth planning around.

A bit ahead of the Alaska Airlines network.

AS 525 arrived on time 84% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon87%(52 flights)
  • Tue85%(46 flights)
  • Wed91%(44 flights)
  • Thu77%(48 flights)
  • Fri84%(49 flights)
  • Sat91%(43 flights)
  • Sun76%(53 flights)
On-time by departure window
  • 6–9 AM81%(31 flights)
  • 9 AM–12 PM79%(19 flights)
  • 6–9 PM85%(285 flights)
On-time trend by month
69%
May

Jun 63% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202580%30
August 202594%31
September 2025100%30
October 202586%29
November 202589%27
December 202564%22
January 202693%30
February 202689%28
March 202693%29
April 202678%23
May 202669%26
Departures on time
82%
Diverted
0%
Flights flown
335
Months covered
12

Same route, other flights

Keep nerding

Based on 337 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.