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Flight Reliability

AS 427 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 427 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

82%
Arrive within 15 minutes
2 min
Average arrival delay
1.7%
Cancelled
7 min early
Median arrival delay

Based on 293 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(43 flights)
  • Tue90%(41 flights)
  • Wed81%(41 flights)
  • Thu83%(41 flights)
  • Fri87%(39 flights)
  • Sat72%(39 flights)
  • Sun74%(43 flights)
On-time by departure window
  • 9 AM–12 PM92%(26 flights)
  • 12–3 PM87%(89 flights)
  • 6–9 PM91%(106 flights)
  • 9 PM–12 AM56%(66 flights)
On-time trend by month
86%
May

Jun 62% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%29
July 202560%30
August 202550%18
November 202590%29
December 2025100%29
January 202679%29
February 202689%28
March 202690%31
April 2026100%29
May 202686%29
Departures on time
77%
Diverted
0.3%
Flights flown
287
Months covered
11

Keep nerding

Based on 293 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.