Route Reliability
Atlanta → San Antonio
ATL–SAT · 874 miles · Hartsfield–Jackson Atlanta International Airport to San Antonio International Airport
- 80%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 1.5%
- Cancelled
- 3,079
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Southwest Airlines84%329 flights
- 2.Delta Air Lines80%2,611 flights
- 3.Frontier Airlines69%101 flights
Not enough history to rank: Spirit Airlines (38 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning flights do better here.
ATL–SAT flights departing between 6–9 AM arrived on time 89% of the time, versus 71% between 6–9 PM.
Sunday scaries are real for this one.
ATL–SAT flights arrived on time 86% of the time on Wednesdays. On Sundays: 74%.
Southwest Airlines runs this route best.
Southwest Airlines arrived on time 84% of the time on this route; Frontier Airlines managed 69%.
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
- Mon76%(484 flights)
- Tue81%(407 flights)
- Wed86%(405 flights)
- Thu81%(444 flights)
- Fri81%(469 flights)
- Sat82%(377 flights)
- Sun74%(444 flights)
- 6–9 AM89%(322 flights)
- 9 AM–12 PM87%(561 flights)
- 12–3 PM81%(697 flights)
- 3–6 PM76%(558 flights)
- 6–9 PM71%(500 flights)
- 9 PM–12 AM78%(392 flights)
Jun 67% → May 75% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 288 |
| July 2025 | 69% | 276 |
| August 2025 | 83% | 268 |
| September 2025 | 87% | 260 |
| October 2025 | 86% | 275 |
| November 2025 | 81% | 246 |
| December 2025 | 80% | 244 |
| January 2026 | 80% | 209 |
| February 2026 | 88% | 218 |
| March 2026 | 82% | 253 |
| April 2026 | 86% | 246 |
| May 2026 | 75% | 247 |
Keep nerding
Based on 3,079 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.