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Flight Reliability

DL 2497 · Delta Air Lines

San Antonio → Detroit (SAT–DTW)

99
Nerd Approved
WanderNerd Reliability Score
95%
Arrive within 15 minutes
5 min early
Average arrival delay
1.1%
Cancelled
12 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Thursday if you can.

DL 2497 arrived on time 100% of the time on Wednesdays. On Thursdays: 89%.

A bit ahead of the SAT–DTW route.

DL 2497 arrived on time 95% of the time, versus 90% across the SAT–DTW route.

Better than the Delta Air Lines network average.

DL 2497 arrived on time 95% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon96%(52 flights)
  • Tue94%(50 flights)
  • Wed100%(51 flights)
  • Thu89%(52 flights)
  • Fri96%(52 flights)
  • Sat96%(52 flights)
  • Sun96%(52 flights)
On-time trend by month
97%
May

Jun 97% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 2025100%30
August 202597%31
September 202593%30
October 202597%31
November 2025100%30
December 202597%31
January 202690%30
February 202696%28
March 202690%30
April 202690%30
May 202697%30
Departures on time
95%
Diverted
0%
Flights flown
361
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.