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Route Reliability

San Diego → San Antonio

SAN–SAT · 1,129 miles · San Diego International Airport to San Antonio International Airport

80
Pretty Reliable
WanderNerd Reliability Score
74%
Arrive within 15 minutes
9 min
Average arrival delay
0.3%
Cancelled
610
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 74% of the time across 610 flights. No comparison to make.

What the data says

Morning-you made the right choice.

SAN–SAT flights departing between 9 AM–12 PM arrived on time 90% of the time, versus 61% between 6–9 PM.

Thursdays have been rough.

SAN–SAT flights arrived on time 83% of the time on Wednesdays and just 67% on Thursdays. That gap is worth planning around.

It basically never cancels.

Out of 610 scheduled flights, only 0.3% were cancelled.

Slipping a little lately.

SAN–SAT flights arrived on time 72% of the time over the last three months in the data, compared with 76% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon68%(93 flights)
  • Tue78%(87 flights)
  • Wed83%(84 flights)
  • Thu67%(92 flights)
  • Fri76%(91 flights)
  • Sat77%(66 flights)
  • Sun71%(93 flights)
On-time by departure window
  • 6–9 AM85%(150 flights)
  • 9 AM–12 PM90%(132 flights)
  • 12–3 PM—(8 flights)
  • 3–6 PM69%(64 flights)
  • 6–9 PM61%(252 flights)
On-time trend by month
61%
May

Jun 75% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%59
July 202575%61
August 202573%56
September 202584%55
October 202568%57
November 202575%55
December 202575%60
January 202674%19
February 202679%19
March 202669%52
April 202684%56
May 202661%57

Keep nerding

Based on 610 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.