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Flight Reliability

DL 1508 · Delta Air Lines

Atlanta → San Antonio (ATL–SAT)

80
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
4 min
Average arrival delay
1.1%
Cancelled
6 min early
Median arrival delay

Based on 356 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 1508 departing between 6–9 PM arrived on time 84% of the time, versus 77% between 9 PM–12 AM.

Skip Thursday if you can.

DL 1508 arrived on time 85% of the time on Saturdays. On Thursdays: 73%.

A bit behind the Delta Air Lines network.

DL 1508 arrived on time 78% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon75%(52 flights)
  • Tue79%(52 flights)
  • Wed82%(51 flights)
  • Thu73%(51 flights)
  • Fri74%(50 flights)
  • Sat85%(46 flights)
  • Sun78%(49 flights)
On-time by departure window
  • 6–9 PM84%(38 flights)
  • 9 PM–12 AM77%(313 flights)
On-time trend by month
74%
May

Jun 63% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%27
July 202553%30
August 202584%31
September 202593%29
October 202584%31
November 202566%29
December 202573%30
January 202680%30
February 202691%23
March 202683%30
April 202690%30
May 202674%31
Departures on time
76%
Diverted
0.3%
Flights flown
351
Months covered
12

Same route, other flights

Keep nerding

Based on 356 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.