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Flight Reliability

AS 1140 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 1140 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

65%
Arrive within 15 minutes
20 min
Average arrival delay
0.7%
Cancelled
7 min
Median arrival delay

Based on 286 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(42 flights)
  • Tue64%(42 flights)
  • Wed73%(41 flights)
  • Thu51%(41 flights)
  • Fri55%(38 flights)
  • Sat66%(38 flights)
  • Sun62%(42 flights)
On-time by departure window
  • 12–3 PM69%(149 flights)
  • 3–6 PM68%(84 flights)
  • 6–9 PM47%(51 flights)
On-time trend by month
84%
May

Jun 63% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202574%31
August 202566%29
September 202536%28
October 202559%17
January 202658%31
February 202668%28
March 202666%29
April 202670%30
May 202684%31
Departures on time
69%
Diverted
0%
Flights flown
284
Months covered
10

Keep nerding

Based on 286 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.