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Flight Reliability

AS 1328 · Alaska Airlines

Seattle → Oakland (SEA–OAK)82% of its flights flew this route. The rest (DFW–SAN, SEA–BOI) are included in these numbers.

70
Usually Fine
WanderNerd Reliability Score
69%
Arrive within 15 minutes
9 min
Average arrival delay
1.8%
Cancelled
2 min early
Median arrival delay

Based on 273 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

AS 1328 departing between 12–3 PM arrived on time 97% of the time, versus 0% between 9 PM–12 AM.

Thursdays have been rough.

AS 1328 arrived on time 80% of the time on Tuesdays and just 62% on Thursdays. That gap is worth planning around.

Lagging the SEA–OAK route.

AS 1328 arrived on time 69% of the time, versus 77% across the SEA–OAK route.

Lagging the Alaska Airlines network.

AS 1328 arrived on time 69% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon71%(41 flights)
  • Tue80%(35 flights)
  • Wed74%(35 flights)
  • Thu62%(39 flights)
  • Fri65%(40 flights)
  • Sat71%(35 flights)
  • Sun65%(43 flights)
On-time by departure window
  • 9 AM–12 PM65%(166 flights)
  • 12–3 PM97%(36 flights)
  • 3–6 PM89%(35 flights)
  • 6–9 PM60%(20 flights)
  • 9 PM–12 AM0%(11 flights)
On-time trend by month
26%
May

Jun 63% → May 26% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%19
July 202553%30
August 202528%18
October 202567%18
November 202586%28
December 202565%31
January 202687%31
February 2026100%11
March 202697%30
April 202683%29
May 202626%23
Departures on time
71%
Diverted
0%
Flights flown
268
Months covered
11

Same route, other flights

Keep nerding

Based on 273 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.