San Antonio (SAT) to Atlanta (ATL): On-Time Performance
Data through July 2026
When you fly SAT to ATL matters as much as anything else about the booking: the route swung from 95% on-time in September 2025 to just 69% in June 2025. Across the full period the route averages 84% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 77%), which matters most in the rough months.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 8.2
- last 12 months
- Duration
- 2h 22m
- scheduled
- Distance
- 874 mi
Best airline from SAT to ATL
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 85% | 12 min | 1.6% | 5,198 |
| Southwest Airlines | 83% | 9 min | 0.5% | 947 |
| Spirit Airlines | 61% | 28 min | 1.1% | 91 |
| Frontier Airlines | 58% | 58 min | 2.9% | 105 |
Monthly on-time trend
Best time to fly from SAT to ATL
Aim for departures around 6 a.m. (93% on-time); avoid 3 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 16 min |
| Tuesday | 86% | 11 min |
| Wednesdaybest | 89% | 10 min |
| Thursday | 85% | 10 min |
| Friday | 81% | 15 min |
| Saturday | 86% | 11 min |
| Sunday | 79% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations37%
- National airspace system18%
- Weather5%
Frequently asked questions
- How often are flights from SAT to ATL delayed?
- 17% of SAT–ATL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from SAT to ATL?
- Delta Air Lines has the best on-time record on this route at 85%, based on 5,198 flights. 4 airlines flew SAT–ATL frequently enough to compare in this period.
- What is the best time of day to fly from SAT to ATL?
- Departures around 6 a.m. have the best record (93% on-time), while departures around 3 p.m. have the worst (67%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SAT to ATL?
- The scheduled SAT–ATL flight time averages 2h 22m over 874 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are SAT to ATL flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SAT to ATL?
- June 2025 was the roughest month in this dataset, with only 69% of arrivals on time. The best was September 2025 at 95%. If your dates are flexible, that 26-point gap is worth planning around.
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Based on 6,341 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.