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Flight Reliability

AS 1131 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 1131 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

55%
Arrive within 15 minutes
25 min
Average arrival delay
1.8%
Cancelled
9 min
Median arrival delay

Based on 169 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon50%(26 flights)
  • Tue47%(19 flights)
  • Wed68%(19 flights)
  • Thu57%(28 flights)
  • Fri42%(26 flights)
  • Sat67%(21 flights)
  • Sun59%(27 flights)
On-time by departure window
  • 12–3 PM74%(19 flights)
  • 3–6 PM58%(40 flights)
  • 6–9 PM51%(107 flights)
On-time trend by month
74%
May

Jun 53% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%19
July 202536%28
August 202550%26
September 202571%17
October 202559%17
March 202662%13
April 202662%21
May 202674%19
Departures on time
58%
Diverted
0%
Flights flown
166
Months covered
9

Keep nerding

Based on 169 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.