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Flight Reliability

AS 646 · Alaska Airlines

Dallas–Fort Worth → Portland (DFW–PDX)100% of its flights flew this route. The rest (SEA–SLC) are included in these numbers.

79
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
1.2%
Cancelled
4 min early
Median arrival delay

Based on 333 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

AS 646 arrived on time 82% of the time on Thursdays. On Sundays: 74%.

Better than the DFW–PDX route average.

AS 646 arrived on time 77% of the time, versus 65% across the DFW–PDX route.

A bit behind the Alaska Airlines network.

AS 646 arrived on time 77% of the time, versus 80% across the Alaska Airlines network.

Trending in the right direction.

AS 646 arrived on time 89% of the time over the last three months in the data, compared with 79% in the three months before that.

The breakdown

On-time by weekday
  • Mon75%(48 flights)
  • Tue76%(50 flights)
  • Wed77%(43 flights)
  • Thu82%(50 flights)
  • Fri77%(48 flights)
  • Sat75%(40 flights)
  • Sun74%(49 flights)
On-time by departure window
  • 3–6 PM76%(322 flights)
  • 6–9 PM—(6 flights)
On-time trend by month
81%
May

Jun 45% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202545%20
July 202557%28
August 202561%31
September 202577%30
October 202585%26
November 202583%29
December 202566%29
January 202681%21
February 202691%22
March 202697%31
April 202690%30
May 202681%31
Departures on time
72%
Diverted
0.3%
Flights flown
328
Months covered
12

Same route, other flights

Keep nerding

Based on 333 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.