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Flight Reliability

AS 1159 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 1159 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

75%
Arrive within 15 minutes
8 min
Average arrival delay
0.3%
Cancelled
2 min
Median arrival delay

Based on 296 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(42 flights)
  • Tue79%(42 flights)
  • Wed83%(41 flights)
  • Thu74%(43 flights)
  • Fri76%(42 flights)
  • Sat65%(43 flights)
  • Sun71%(42 flights)
On-time trend by month
58%
May

Jun 93% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202590%31
August 202587%30
September 202590%29
October 202588%25
January 202665%31
February 202646%28
March 202670%30
April 202667%30
May 202658%31
Departures on time
77%
Diverted
0%
Flights flown
295
Months covered
10

Keep nerding

Based on 296 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.