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Flight Reliability

AS 544 · Alaska Airlines

Ontario → Portland (ONT–PDX)94% of its flights flew this route. The rest (SEA–IND, DEN–SEA) are included in these numbers.

99
Nerd Approved
WanderNerd Reliability Score
93%
Arrive within 15 minutes
10 min early
Average arrival delay
0.5%
Cancelled
16 min early
Median arrival delay

Based on 201 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AS 544 departing between 6–9 AM arrived on time 94% of the time, versus 73% between 9 PM–12 AM.

Thursday is the weak spot.

AS 544 arrived on time 100% of the time on Mondays. On Thursdays: 86%.

Better than the Alaska Airlines network average.

AS 544 arrived on time 93% of the time, versus 80% across the Alaska Airlines network.

Slipping a little lately.

AS 544 arrived on time 92% of the time over the last three months in the data, compared with 97% in the three months before that.

The breakdown

On-time by weekday
  • Mon100%(31 flights)
  • Tue87%(31 flights)
  • Wed92%(26 flights)
  • Thu86%(29 flights)
  • Fri100%(27 flights)
  • Sat93%(30 flights)
  • Sun92%(26 flights)
On-time by departure window
  • 6–9 AM94%(189 flights)
  • 9 PM–12 AM73%(11 flights)
On-time trend by month
100%
May

Jun 73% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%11
November 202596%27
December 202593%30
January 202697%31
February 2026100%26
March 202682%28
April 202693%29
May 2026100%12
Departures on time
91%
Diverted
0%
Flights flown
200
Months covered
9

Same route, other flights

Keep nerding

Based on 201 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.