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Flight Reliability

AS 399 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 399 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

92%
Arrive within 15 minutes
7 min early
Average arrival delay
1.7%
Cancelled
12 min early
Median arrival delay

Based on 301 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(42 flights)
  • Tue93%(44 flights)
  • Wed88%(41 flights)
  • Thu93%(42 flights)
  • Fri95%(41 flights)
  • Sat95%(41 flights)
  • Sun87%(45 flights)
On-time by departure window
  • 6–9 AM94%(218 flights)
  • 9 AM–12 PM91%(67 flights)
  • 6–9 PM46%(11 flights)
On-time trend by month
94%
May

Jun 70% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%30
July 202590%30
August 202593%30
September 202593%30
November 202596%26
December 202596%27
February 2026100%17
March 202694%31
April 202697%30
May 202694%31
Departures on time
93%
Diverted
0%
Flights flown
296
Months covered
12

Keep nerding

Based on 301 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.