ATL to SAT flight delays
Atlanta, GA (ATL) San Antonio, TX (SAT) · 874 miles
3,027 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
81.2%
Arrived on time
Within 15 minutes of schedule
1.49%
Cancelled
Share of scheduled flights
55 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
The season swings this route hard. In February it ran 18.2 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The 2 airlines here are separated by under 1 point — close enough to call a tie. Choose on price and departure time.
The Atlanta to San Antonio route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on ATL to SAT. Southwest Airlines was late most often. Flights ran closest to schedule in February and worst in July.
Every airline on ATL to SAT
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 | 2,610 | 81.5% | 1.69% | 53 min | C |
| Southwest Airlines | 318 | 81.39% | 0.31% | 49 min | B |
| Frontier Airlines | 91 | 71.43% | 0% | 94 min | — |
| Spirit Airlines | 8 | 87.5% | 0% | 15 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SAT to ATL San Antonio back to Atlanta 86.13% on time BOther routes from Atlanta
Common questions
Are flights from Atlanta to San Antonio usually delayed?
81.2% of flights on the ATL to SAT route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Atlanta to San Antonio?
Delta Air Lines, at 81.5% on time across 2,610 flights. The least punctual on the route was Southwest Airlines at 81.39%.
How often are ATL to SAT flights cancelled?
1.49% of scheduled flights did not operate — about 15 in every thousand. That is in the normal range.
What is the best month to fly Atlanta to San Antonio?
February, when 86.7% of flights arrived on time. The worst was July at 68.5%.
When ATL to SAT flights are late, how late are they?
About 55 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 ATL to SAT 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 →