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Flight Reliability

AS 574 · Alaska Airlines

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

79
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
2 min
Average arrival delay
1.8%
Cancelled
8 min early
Median arrival delay

Based on 227 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

AS 574 arrived on time 93% of the time on Tuesdays and just 65% on Sundays. That gap is worth planning around.

A bit behind the SAN–SEA route.

AS 574 arrived on time 78% of the time, versus 81% across the SAN–SEA route.

Slipping a little lately.

AS 574 arrived on time 79% of the time over the last three months in the data, compared with 82% in the three months before that.

The breakdown

On-time by weekday
  • Mon77%(34 flights)
  • Tue93%(30 flights)
  • Wed83%(30 flights)
  • Thu75%(32 flights)
  • Fri73%(33 flights)
  • Sat83%(30 flights)
  • Sun65%(34 flights)
On-time by departure window
  • 3–6 PM80%(74 flights)
  • 6–9 PM77%(149 flights)
On-time trend by month
84%
May

Oct 59% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202559%17
November 202575%28
December 202576%29
January 202681%31
February 202689%28
March 202666%29
April 202687%30
May 202684%31
Departures on time
74%
Diverted
0%
Flights flown
223
Months covered
8

Same route, other flights

Keep nerding

Based on 227 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.