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Flight Reliability

AS 590 · Alaska Airlines

Seattle → San Francisco (SEA–SFO)95% of its flights flew this route. The rest (SEA–DFW) are included in these numbers.

63
A Little Dicey
WanderNerd Reliability Score
66%
Arrive within 15 minutes
18 min
Average arrival delay
1.8%
Cancelled
4 min
Median arrival delay

Based on 218 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

AS 590 departing between 3–6 PM arrived on time 73% of the time, versus 55% between 9 AM–12 PM.

Friday is doing you no favors.

AS 590 arrived on time 79% of the time on Tuesdays and just 56% on Fridays. That gap is worth planning around.

A bit behind the SEA–SFO route.

AS 590 arrived on time 66% of the time, versus 70% across the SEA–SFO route.

Lagging the Alaska Airlines network.

AS 590 arrived on time 66% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon63%(38 flights)
  • Tue79%(29 flights)
  • Wed71%(28 flights)
  • Thu74%(35 flights)
  • Fri56%(36 flights)
  • Sat58%(19 flights)
  • Sun62%(29 flights)
On-time by departure window
  • 9 AM–12 PM55%(11 flights)
  • 3–6 PM73%(92 flights)
  • 6–9 PM62%(111 flights)
On-time trend by month
71%
Mar

Jun 52% → Mar 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202552%25
July 202568%25
August 202580%25
September 202584%25
November 202550%20
December 202555%29
January 202672%18
February 202670%23
March 202671%17
Departures on time
63%
Diverted
0%
Flights flown
214
Months covered
10

Same route, other flights

Keep nerding

Based on 218 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.