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Flight Reliability

AS 571 · Alaska Airlines

San Francisco → Las Vegas (SFO–LAS)81% of its flights flew this route. The rest (RNO–SEA, SFO–SAN) are included in these numbers.

82
Pretty Reliable
WanderNerd Reliability Score
75%
Arrive within 15 minutes
10 min
Average arrival delay
0%
Cancelled
5 min early
Median arrival delay

Based on 193 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AS 571 departing between 6–9 AM arrived on time 92% of the time, versus 63% between 9 PM–12 AM.

Sunday scaries are real for this one.

AS 571 arrived on time 84% of the time on Wednesdays and just 59% on Sundays. That gap is worth planning around.

A bit behind the Alaska Airlines network.

AS 571 arrived on time 75% of the time, versus 80% across the Alaska Airlines network.

It basically never cancels.

Out of 193 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon72%(29 flights)
  • Tue67%(27 flights)
  • Wed84%(25 flights)
  • Thu82%(28 flights)
  • Fri79%(28 flights)
  • Sat82%(27 flights)
  • Sun59%(29 flights)
On-time by departure window
  • 6–9 AM92%(36 flights)
  • 3–6 PM80%(70 flights)
  • 9 PM–12 AM63%(87 flights)
On-time trend by month
52%
Apr

Jun 68% → Apr 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%19
July 202581%31
August 202595%19
November 202593%28
December 202564%14
February 202688%17
March 202660%30
April 202652%21
Departures on time
72%
Diverted
0%
Flights flown
193
Months covered
11

Same route, other flights

Keep nerding

Based on 193 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.