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Flight Reliability

AS 623 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 623 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

71%
Arrive within 15 minutes
10 min
Average arrival delay
1.5%
Cancelled
3 min
Median arrival delay

Based on 265 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(41 flights)
  • Tue82%(34 flights)
  • Wed70%(33 flights)
  • Thu66%(38 flights)
  • Fri58%(36 flights)
  • Sat80%(35 flights)
  • Sun71%(42 flights)
On-time by departure window
  • 9 AM–12 PM69%(67 flights)
  • 3–6 PM82%(67 flights)
  • 6–9 PM66%(125 flights)
On-time trend by month
86%
May

Jun 79% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%19
July 202559%29
August 202574%19
November 202552%21
December 202559%29
January 202668%31
February 202668%28
March 202678%27
April 202687%23
May 202686%29
Departures on time
83%
Diverted
0.8%
Flights flown
259
Months covered
11

Keep nerding

Based on 265 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.