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Flight Reliability

AS 512 · Alaska Airlines

San Francisco → Austin (SFO–AUS)90% of its flights flew this route. The rest (DFW–SAN, ANC–SAN) are included in these numbers.

98
Nerd Approved
WanderNerd Reliability Score
93%
Arrive within 15 minutes
8 min early
Average arrival delay
0.4%
Cancelled
15 min early
Median arrival delay

Based on 245 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

AS 512 departing between 6–9 AM arrived on time 95% of the time, versus 76% between 3–6 PM.

Friday is doing you no favors.

AS 512 arrived on time 97% of the time on Wednesdays. On Fridays: 88%.

Well ahead of the SFO–AUS route.

AS 512 arrived on time 93% of the time, versus 77% across the SFO–AUS route.

Better than the Alaska Airlines network average.

AS 512 arrived on time 93% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon94%(34 flights)
  • Tue94%(35 flights)
  • Wed97%(35 flights)
  • Thu91%(34 flights)
  • Fri88%(34 flights)
  • Sat95%(37 flights)
  • Sun94%(34 flights)
On-time by departure window
  • 6–9 AM95%(218 flights)
  • 12–3 PM—(4 flights)
  • 3–6 PM76%(21 flights)
On-time trend by month
93%
May

Jun 100% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%30
July 202597%29
August 202597%31
September 2025100%30
October 202597%31
November 202590%30
December 202587%31
May 202693%15
Departures on time
92%
Diverted
0.4%
Flights flown
243
Months covered
11

Same route, other flights

Keep nerding

Based on 245 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.