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Flight Reliability

AS 48 · Alaska Airlines

Anchorage → Seattle (ANC–SEA)

94
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
5 min early
Average arrival delay
0.6%
Cancelled
13 min early
Median arrival delay

Based on 309 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 9 AM–12 PM arrived on time 92% of the time, against 87% between 6–9 AM.

Skip Tuesday if you can.

AS 48 arrived on time 94% of the time on Thursdays. On Tuesdays: 82%.

Better than the Alaska Airlines network average.

AS 48 arrived on time 88% of the time, versus 80% across the Alaska Airlines network.

Trending in the right direction.

AS 48 arrived on time 91% of the time over the last three months in the data, compared with 80% in the three months before that.

The breakdown

On-time by weekday
  • Mon89%(47 flights)
  • Tue82%(44 flights)
  • Wed88%(34 flights)
  • Thu94%(47 flights)
  • Fri84%(45 flights)
  • Sat88%(42 flights)
  • Sun90%(48 flights)
On-time by departure window
  • 6–9 AM87%(229 flights)
  • 9 AM–12 PM92%(78 flights)
On-time trend by month
90%
May

Jun 87% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202584%31
August 202582%28
September 2025100%28
October 2025100%28
November 202590%30
December 202587%15
January 202662%26
February 202691%23
March 202689%28
April 202695%21
May 202690%19
Departures on time
90%
Diverted
0%
Flights flown
307
Months covered
12

Same route, other flights

Keep nerding

Based on 309 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.