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Flight Reliability

AS 1388 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 1388 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

90%
Arrive within 15 minutes
3 min early
Average arrival delay
5.4%
Cancelled
11 min early
Median arrival delay

Based on 315 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(48 flights)
  • Tue87%(47 flights)
  • Wed93%(44 flights)
  • Thu89%(45 flights)
  • Fri93%(41 flights)
  • Sat91%(32 flights)
  • Sun87%(39 flights)
On-time by departure window
  • 6–9 AM87%(117 flights)
  • 9 AM–12 PM93%(136 flights)
  • 12–3 PM96%(24 flights)
  • 6–9 PM79%(19 flights)
On-time trend by month
86%
May

Oct 100% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 2025100%12
November 202593%56
December 202591%54
January 202681%48
February 202687%39
March 202697%35
April 202691%23
May 202686%29
Departures on time
88%
Diverted
0.6%
Flights flown
296
Months covered
8

Keep nerding

Based on 315 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.