Route Reliability
San Antonio → Atlanta
SAT–ATL · 874 miles · San Antonio International Airport to Hartsfield–Jackson Atlanta International Airport
- 86%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 1.6%
- Cancelled
- 3,078
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines87%2,610 flights
- 2.Southwest Airlines82%329 flights
- 3.Frontier Airlines61%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.
SAT–ATL flights departing between 3–6 AM arrived on time 94% of the time, versus 76% between 3–6 PM.
Monday is the weak spot.
SAT–ATL flights arrived on time 92% of the time on Wednesdays. On Mondays: 80%.
Delta Air Lines has a clear lead on this route.
Delta Air Lines arrived on time 87% of the time on this route; Frontier Airlines managed 61%.
Slipping a little lately.
SAT–ATL flights arrived on time 84% of the time over the last three months in the data, compared with 87% in the three months before that.
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
- Mon80%(479 flights)
- Tue88%(404 flights)
- Wed92%(408 flights)
- Thu86%(443 flights)
- Fri85%(468 flights)
- Sat88%(368 flights)
- Sun81%(442 flights)
- 3–6 AM94%(357 flights)
- 6–9 AM93%(684 flights)
- 9 AM–12 PM89%(447 flights)
- 12–3 PM80%(770 flights)
- 3–6 PM76%(473 flights)
- 6–9 PM81%(281 flights)
Jun 71% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 285 |
| July 2025 | 79% | 275 |
| August 2025 | 86% | 263 |
| September 2025 | 95% | 260 |
| October 2025 | 90% | 275 |
| November 2025 | 93% | 244 |
| December 2025 | 87% | 244 |
| January 2026 | 86% | 207 |
| February 2026 | 89% | 216 |
| March 2026 | 83% | 252 |
| April 2026 | 89% | 246 |
| May 2026 | 81% | 245 |
Keep nerding
Based on 3,078 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.