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Flight Reliability

AS 2129 · Alaska Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AS 2129 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

85%
Arrive within 15 minutes
1 min
Average arrival delay
0.7%
Cancelled
4 min early
Median arrival delay

Based on 290 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(45 flights)
  • Tue89%(37 flights)
  • Wed86%(35 flights)
  • Thu86%(44 flights)
  • Fri84%(44 flights)
  • Sat87%(39 flights)
  • Sun77%(44 flights)
On-time by departure window
  • 9 AM–12 PM78%(150 flights)
  • 3–6 PM93%(110 flights)
  • 9 PM–12 AM96%(28 flights)
On-time trend by month
100%
May

Jun 90% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202590%31
August 202597%31
September 202577%30
October 202568%31
November 202583%29
December 202577%31
February 202690%10
March 202687%23
April 2026100%24
May 2026100%12
Departures on time
89%
Diverted
0%
Flights flown
288
Months covered
12

Keep nerding

Based on 290 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.