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Flight Reliability

AS 2004 · Alaska Airlines

Portland → Boise (PDX–BOI)87% of its flights flew this route. The rest (BOI–PDX, SJC–SAN) are included in these numbers.

89
Pretty Reliable
WanderNerd Reliability Score
89%
Arrive within 15 minutes
1 min
Average arrival delay
1.7%
Cancelled
6 min early
Median arrival delay

Based on 287 historical flights. Data through May 2026.

What the data says

3–6 PM has a slight edge.

Departures between 3–6 PM arrived on time 89% of the time, against 85% between 6–9 PM.

Sunday scaries are real for this one.

AS 2004 arrived on time 98% of the time on Mondays and just 81% on Sundays. That gap is worth planning around.

Better than the Alaska Airlines network average.

AS 2004 arrived on time 89% of the time, versus 80% across the Alaska Airlines network.

Trending in the right direction.

AS 2004 arrived on time 98% of the time over the last three months in the data, compared with 90% in the three months before that.

The breakdown

On-time by weekday
  • Mon98%(43 flights)
  • Tue88%(42 flights)
  • Wed88%(42 flights)
  • Thu85%(40 flights)
  • Fri90%(40 flights)
  • Sat94%(32 flights)
  • Sun81%(42 flights)
On-time by departure window
  • 3–6 PM89%(254 flights)
  • 6–9 PM85%(27 flights)
On-time trend by month
100%
May

Jun 87% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202587%31
August 202590%29
September 202576%25
October 202587%31
November 202596%22
December 202581%21
February 202693%15
March 202697%29
April 202697%29
May 2026100%11
Departures on time
88%
Diverted
0.3%
Flights flown
281
Months covered
12

Same route, other flights

Keep nerding

Based on 287 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.