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Flight Reliability

AS 339 · Alaska Airlines

Austin → Seattle (AUS–SEA)91% of its flights flew this route. The rest (SJC–HNL, SEA–LAS) are included in these numbers.

75
Usually Fine
WanderNerd Reliability Score
71%
Arrive within 15 minutes
9 min
Average arrival delay
1.0%
Cancelled
1 min early
Median arrival delay

Based on 314 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AS 339 departing between 6–9 AM arrived on time 94% of the time, versus 70% between 6–9 PM.

Saturday is the weak spot.

AS 339 arrived on time 78% of the time on Mondays. On Saturdays: 66%.

Lagging the AUS–SEA route.

AS 339 arrived on time 71% of the time, versus 83% across the AUS–SEA route.

Lagging the Alaska Airlines network.

AS 339 arrived on time 71% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon78%(51 flights)
  • Tue74%(38 flights)
  • Wed71%(45 flights)
  • Thu70%(50 flights)
  • Fri72%(43 flights)
  • Sat66%(32 flights)
  • Sun67%(52 flights)
On-time by departure window
  • 6–9 AM94%(18 flights)
  • 6–9 PM70%(293 flights)
On-time trend by month
93%
May

Jun 47% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%30
July 202559%29
August 202556%27
September 202571%21
October 202591%22
November 202576%29
December 202571%31
January 202670%20
February 202691%23
March 202658%26
April 202683%24
May 202693%29
Departures on time
71%
Diverted
0%
Flights flown
311
Months covered
12

Same route, other flights

Keep nerding

Based on 314 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.