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Route Reliability

Detroit → San Antonio

DTW–SAT · 1,214 miles · Detroit Metropolitan Wayne County Airport to San Antonio International Airport

86
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
2 min
Average arrival delay
0.7%
Cancelled
961
Flights in the data

Data through May 2026.

Airlines on this route

  • Delta Air Lines81% on time · 935 flights
  • Spirit Airlines89% on time · 26 flights

Too little history on this route to call a winner. We rank airlines only after 100 flights each.

What the data says

Morning flights do better here.

DTW–SAT flights departing between 9 AM–12 PM arrived on time 95% of the time, versus 70% between 3–6 PM.

Sunday scaries are real for this one.

DTW–SAT flights arrived on time 91% of the time on Tuesdays and just 74% on Sundays. That gap is worth planning around.

Trending in the right direction.

DTW–SAT flights arrived on time 82% of the time over the last three months in the data, compared with 74% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon81%(149 flights)
  • Tue91%(138 flights)
  • Wed83%(138 flights)
  • Thu86%(138 flights)
  • Fri78%(145 flights)
  • Sat78%(102 flights)
  • Sun74%(142 flights)
On-time by departure window
  • 6–9 AM87%(331 flights)
  • 9 AM–12 PM95%(38 flights)
  • 12–3 PM86%(220 flights)
  • 3–6 PM70%(10 flights)
  • 6–9 PM72%(297 flights)
  • 9 PM–12 AM79%(56 flights)
On-time trend by month
77%
May

Jun 83% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%92
July 202578%90
August 202590%97
September 202585%82
October 202590%83
November 202583%83
December 202573%86
January 202664%63
February 202684%56
March 202687%61
April 202683%76
May 202677%83

Keep nerding

Based on 961 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.