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Flight Reliability

AS 2134 · Alaska Airlines

Portland → Ontario (PDX–ONT)81% of its flights flew this route. The rest (FCA–SEA, SEA–FCA) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
2 min early
Average arrival delay
1.5%
Cancelled
7 min early
Median arrival delay

Based on 342 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 91% of the time, against 84% between 6–9 PM.

Skip Thursday if you can.

AS 2134 arrived on time 96% of the time on Saturdays. On Thursdays: 87%.

A bit ahead of the PDX–ONT route.

AS 2134 arrived on time 90% of the time, versus 86% across the PDX–ONT route.

Better than the Alaska Airlines network average.

AS 2134 arrived on time 90% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon92%(50 flights)
  • Tue88%(50 flights)
  • Wed87%(47 flights)
  • Thu87%(45 flights)
  • Fri89%(46 flights)
  • Sat96%(48 flights)
  • Sun88%(50 flights)
On-time by departure window
  • 6–9 AM91%(226 flights)
  • 9 AM–12 PM89%(46 flights)
  • 3–6 PM84%(32 flights)
  • 6–9 PM84%(32 flights)
On-time trend by month
100%
May

Jun 81% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%41
July 202594%31
August 202583%30
September 202580%30
October 202590%50
November 2025100%27
December 202587%31
February 202694%17
March 2026100%31
April 202690%30
May 2026100%12
Departures on time
94%
Diverted
0.3%
Flights flown
336
Months covered
12

Same route, other flights

Keep nerding

Based on 342 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.