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Flight Reliability

AS 1155 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 1155 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

79%
Arrive within 15 minutes
8 min
Average arrival delay
3.5%
Cancelled
1 min
Median arrival delay

Based on 228 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(32 flights)
  • Tue90%(31 flights)
  • Wed81%(32 flights)
  • Thu74%(31 flights)
  • Fri63%(32 flights)
  • Sat87%(31 flights)
  • Sun84%(31 flights)
On-time by departure window
  • 3–6 AM97%(78 flights)
  • 12–3 PM46%(11 flights)
  • 3–6 PM71%(131 flights)
On-time trend by month
71%
May

Jun 100% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%11
August 2025100%12
September 202597%30
October 202596%25
January 202674%31
February 202668%25
March 202681%26
April 202652%29
May 202671%31
Departures on time
81%
Diverted
0%
Flights flown
220
Months covered
9

Keep nerding

Based on 228 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.