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Flight Reliability

AS 155 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 155 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

78%
Arrive within 15 minutes
4 min
Average arrival delay
4.4%
Cancelled
6 min early
Median arrival delay

Based on 631 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(92 flights)
  • Tue70%(86 flights)
  • Wed79%(86 flights)
  • Thu79%(84 flights)
  • Fri76%(86 flights)
  • Sat87%(84 flights)
  • Sun81%(85 flights)
On-time by departure window
  • 3–6 PM78%(599 flights)
  • 6–9 PM—(2 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
93%
Apr

Jun 85% → Apr 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%59
July 202568%60
August 202557%56
September 202583%60
October 202577%62
November 202575%57
December 202571%48
January 202668%47
February 202691%54
March 202690%58
April 202693%42
Departures on time
76%
Diverted
0%
Flights flown
603
Months covered
11

Keep nerding

Based on 631 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.