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Flight Reliability

AS 558 · Alaska Airlines

Kahului → Portland (OGG–PDX)90% of its flights flew this route. The rest (BUR–SEA, SEA–BUR) are included in these numbers.

87
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
2 min early
Average arrival delay
0.8%
Cancelled
8 min early
Median arrival delay

Based on 369 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

AS 558 departing between 9 AM–12 PM arrived on time 100% of the time, versus 82% between 9 PM–12 AM.

Friday is doing you no favors.

AS 558 arrived on time 89% of the time on Saturdays and just 72% on Fridays. That gap is worth planning around.

A bit ahead of the Alaska Airlines network.

AS 558 arrived on time 84% of the time, versus 80% across the Alaska Airlines network.

Slipping a little lately.

AS 558 arrived on time 80% of the time over the last three months in the data, compared with 83% in the three months before that.

The breakdown

On-time by weekday
  • Mon81%(52 flights)
  • Tue86%(51 flights)
  • Wed82%(51 flights)
  • Thu86%(51 flights)
  • Fri72%(53 flights)
  • Sat89%(54 flights)
  • Sun89%(53 flights)
On-time by departure window
  • 9 AM–12 PM100%(18 flights)
  • 12–3 PM94%(18 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM82%(328 flights)
On-time trend by month
94%
May

Jun 84% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%19
July 202583%29
August 202587%31
September 202580%30
October 202590%29
November 202583%29
December 202574%31
January 202690%31
February 202686%28
March 202674%31
April 202672%29
May 202694%48
Departures on time
80%
Diverted
0.3%
Flights flown
365
Months covered
12

Same route, other flights

Keep nerding

Based on 369 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.