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Flight Reliability

AS 1120 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 1120 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

81%
Arrive within 15 minutes
10 min
Average arrival delay
0.5%
Cancelled
1 min early
Median arrival delay

Based on 218 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon93%(30 flights)
  • Tue77%(30 flights)
  • Wed90%(31 flights)
  • Thu84%(32 flights)
  • Fri61%(31 flights)
  • Sat81%(32 flights)
  • Sun77%(31 flights)
On-time by departure window
  • 6–9 AM100%(66 flights)
  • 3–6 PM72%(151 flights)
On-time trend by month
77%
May

Aug 100% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 2025100%12
September 2025100%30
October 2025100%24
January 202677%31
February 202668%28
March 202665%31
April 202673%30
May 202677%31
Departures on time
83%
Diverted
0%
Flights flown
217
Months covered
8

Keep nerding

Based on 218 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.