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Flight Reliability

AS 337 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 337 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

62%
Arrive within 15 minutes
21 min
Average arrival delay
3.7%
Cancelled
5 min
Median arrival delay

Based on 301 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon60%(45 flights)
  • Tue67%(39 flights)
  • Wed65%(37 flights)
  • Thu63%(43 flights)
  • Fri61%(44 flights)
  • Sat64%(39 flights)
  • Sun58%(43 flights)
On-time by departure window
  • 6–9 AM98%(45 flights)
  • 3–6 PM52%(187 flights)
  • 6–9 PM69%(58 flights)
On-time trend by month
96%
May

Jun 67% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%30
July 202537%30
August 202533%30
September 202545%29
October 202557%28
November 202550%16
December 202548%25
February 202688%17
March 202685%27
April 202696%26
May 202696%26
Departures on time
60%
Diverted
0%
Flights flown
290
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.