SAT to ATL flight delays
San Antonio, TX (SAT) Atlanta, GA (ATL) · 874 miles
3,026 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
86.13%
Arrived on time
Within 15 minutes of schedule
1.55%
Cancelled
Share of scheduled flights
72 min
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Delta Air Lines arrived on time 7.8 points more often than Southwest Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 72 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
Flights from San Antonio to Atlanta keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on SAT to ATL. Southwest Airlines was late most often. Flights ran closest to schedule in September and worst in July.
Every airline on SAT to ATL
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 2,609 | 87.77% | 1.76% | 75 min | B |
| Southwest Airlines | 318 | 79.94% | 0.31% | 46 min | B |
| Frontier Airlines | 91 | 62.22% | 0% | 99 min | — |
| Spirit Airlines | 8 | 75% | 0% | 31 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
ATL to SAT Atlanta back to San Antonio 81.2% on time COther routes from San Antonio
Common questions
Are flights from San Antonio to Atlanta usually delayed?
86.13% of flights on the SAT to ATL route arrived within 15 minutes of schedule, so roughly 1 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from San Antonio to Atlanta?
Delta Air Lines, at 87.77% on time across 2,609 flights. The least punctual on the route was Southwest Airlines at 79.94%.
How often are SAT to ATL flights cancelled?
1.55% of scheduled flights did not operate — about 16 in every thousand. That is in the normal range.
What is the best month to fly San Antonio to Atlanta?
September, when 94.6% of flights arrived on time. The worst was July at 76.7%.
When SAT to ATL flights are late, how late are they?
About 72 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SAT to ATL during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →