Delta Air Lines ATL to SAT on-time performance
Delta Air Lines nonstop flights from Atlanta to San Antonio · Aug 2025 – Jul 2026
On-time arrivals
81%
arrived < 15 min late
Cancelled
1.8%
48 flights
Avg arrival delay
11 min
55 min when late
Rank on route
#2 of 3
route average 81% on time
Key facts
- Delta Air Lines flights on ATL to SAT arrived on time 81% of the time in Aug 2025 – Jul 2026.
- 1.8% were cancelled, and 5% arrived an hour or more late.
- That ranks #2 of 3 airlines on this route, which averaged 81% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (50%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)50%
- Late-arriving aircraft28%
- Air traffic control & airport congestion18%
- Extreme weather4%
- Security0%
Other airlines on ATL to SAT
- Southwest Airlines82% on time · 10 min avg delay
- Frontier Airlines75% on time · 26 min avg delay
Full ATL to SAT comparison →
Delta Air Lines on-time record across all routes →
2,612 Delta Air Lines flights tracked on this route; 48 cancelled, 4 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.