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Flight Reliability

AS 511 · Alaska Airlines

Phoenix → Portland (PHX–PDX)95% of its flights flew this route. The rest (SEA–SFO, PSP–SFO) are included in these numbers.

96
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
2 min early
Average arrival delay
0%
Cancelled
8 min early
Median arrival delay

Based on 314 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

AS 511 arrived on time 94% of the time on Thursdays and just 77% on Fridays. That gap is worth planning around.

Better than the PHX–PDX route average.

AS 511 arrived on time 88% of the time, versus 80% across the PHX–PDX route.

Better than the Alaska Airlines network average.

AS 511 arrived on time 88% of the time, versus 80% across the Alaska Airlines network.

It basically never cancels.

Out of 314 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon92%(48 flights)
  • Tue88%(42 flights)
  • Wed86%(44 flights)
  • Thu94%(49 flights)
  • Fri77%(44 flights)
  • Sat86%(43 flights)
  • Sun89%(44 flights)
On-time by departure window
  • 6–9 AM89%(303 flights)
  • 9 AM–12 PM—(4 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM—(6 flights)
On-time trend by month
95%
May

Jun 93% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202590%31
August 202594%31
September 202593%30
October 202584%31
November 202580%30
December 202583%30
January 202690%31
February 202686%28
April 202654%13
May 202695%20
Departures on time
88%
Diverted
0%
Flights flown
314
Months covered
12

Same route, other flights

Keep nerding

Based on 314 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.