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Flight Reliability

AS 605 · Alaska Airlines

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

94
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
2 min
Average arrival delay
0.9%
Cancelled
8 min early
Median arrival delay

Based on 229 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AS 605 departing between 6–9 AM arrived on time 94% of the time, versus 36% between 3–6 PM.

Sunday scaries are real for this one.

AS 605 arrived on time 94% of the time on Thursdays. On Sundays: 85%.

A bit ahead of the PHX–SEA route.

AS 605 arrived on time 90% of the time, versus 84% across the PHX–SEA route.

Better than the Alaska Airlines network average.

AS 605 arrived on time 90% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon91%(32 flights)
  • Tue91%(33 flights)
  • Wed91%(33 flights)
  • Thu94%(31 flights)
  • Fri88%(33 flights)
  • Sat90%(31 flights)
  • Sun85%(34 flights)
On-time by departure window
  • 3–6 AM81%(16 flights)
  • 6–9 AM94%(199 flights)
  • 3–6 PM36%(11 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
97%
May

Jun 36% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202536%11
November 202590%29
December 202590%31
January 202694%31
February 202696%28
March 202687%30
April 202697%30
May 202697%30
Departures on time
90%
Diverted
0%
Flights flown
227
Months covered
9

Same route, other flights

Keep nerding

Based on 229 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.