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Flight Reliability

AS 2439 · Alaska Airlines

PUW → Seattle (PUW–SEA)81% of its flights flew this route. The rest (OAK–SEA) are included in these numbers.

80
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
11 min
Average arrival delay
1.6%
Cancelled
1 min early
Median arrival delay

Based on 184 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

AS 2439 departing between 9 AM–12 PM arrived on time 97% of the time, versus 74% between 6–9 PM.

Thursdays have been rough.

AS 2439 arrived on time 89% of the time on Tuesdays and just 56% on Thursdays. That gap is worth planning around.

A bit behind the PUW–SEA route.

AS 2439 arrived on time 79% of the time, versus 83% across the PUW–SEA route.

Trending in the right direction.

AS 2439 arrived on time 87% of the time over the last three months in the data, compared with 75% in the three months before that.

The breakdown

On-time by weekday
  • Mon85%(27 flights)
  • Tue89%(27 flights)
  • Wed86%(28 flights)
  • Thu56%(27 flights)
  • Fri78%(27 flights)
  • Sat83%(18 flights)
  • Sun74%(27 flights)
On-time by departure window
  • 9 AM–12 PM97%(35 flights)
  • 6–9 PM74%(146 flights)
On-time trend by month
67%
May

Jun 78% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%18
July 202566%29
August 202569%29
September 202581%26
December 202577%17
March 202693%14
April 2026100%21
May 202667%15
Departures on time
80%
Diverted
0%
Flights flown
181
Months covered
10

Same route, other flights

Keep nerding

Based on 184 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.