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Flight Reliability

AS 611 · Alaska Airlines

Phoenix → Seattle (PHX–SEA)97% of its flights flew this route. The rest (SFO–LAS) are included in these numbers.

81
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
4 min
Average arrival delay
1.2%
Cancelled
6 min early
Median arrival delay

Based on 325 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

AS 611 departing between 6–9 PM arrived on time 83% of the time, versus 62% between 3–6 PM.

Skip Thursday if you can.

AS 611 arrived on time 87% of the time on Sundays. On Thursdays: 72%.

A bit behind the PHX–SEA route.

AS 611 arrived on time 78% of the time, versus 84% across the PHX–SEA route.

The breakdown

On-time by weekday
  • Mon79%(52 flights)
  • Tue74%(42 flights)
  • Wed75%(48 flights)
  • Thu72%(50 flights)
  • Fri76%(45 flights)
  • Sat84%(31 flights)
  • Sun87%(53 flights)
On-time by departure window
  • 3–6 PM62%(76 flights)
  • 6–9 PM83%(245 flights)
On-time trend by month
87%
May

Jun 62% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%29
July 202557%30
August 202567%27
September 202571%21
October 202580%25
November 202581%26
December 202582%22
January 202696%23
February 202681%26
March 202690%31
April 202683%30
May 202687%31
Departures on time
77%
Diverted
0%
Flights flown
321
Months covered
12

Same route, other flights

Keep nerding

Based on 325 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.