Which airline is most reliable for ATL (Atlanta) to SAT (San Antonio)?

The most reliable airline on the ATL to SAT route is Southwest Airlines, with an on-time arrival rate of 80%.

How often are flights delayed from ATL to SAT?

About 21% of flights from ATL to SAT experience delays. 79% arrive on time.

What's the average delay on ATL to SAT flights?

When flights from ATL to SAT are delayed, the average delay is approximately 55 minutes.

Is a short connection safe after a ATL to SAT flight?

With 79% of ATL to SAT flights arriving on time and an average delay of 55 minutes when late, a connection under 60 minutes at SAT is risky. We recommend at least 75-90 minutes for domestic connections after this route.

ATL → SAT

ATL (Atlanta) to SAT (San Antonio)

ATL (Atlanta) to SAT (San Antonio) flights arrive on time 79% of the time. The most reliable airline on this route is Southwest Airlines at 80%. The average delay is 55 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated March 2026.

ATL → SAT on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

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This route is on time most of the time. About 79% of flights arrive on schedule.

Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Accurate?

Southwest Airlines is significantly more reliable on this route at 80% on time vs Frontier Airlines at 61%.

Airline Comparison

Southwest Airlines leads at 80% on time; Frontier Airlines trails at 61%.

Accurate?

Good to know

Departing from ATL

83% on time

Expect ~16 min sitting on the taxiway after your gate pushes back. ATL has long runway queues.

TSA is currently ~5 min. Best time: 4 AM (about 5 min).

More about ATL →

Arriving at SAT

81% on time

When flights into SAT are late, the average delay is 67 minutes. Build buffer if you have ground plans.

If connecting at SAT: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.

More about SAT →Connection times at SAT →

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Delay riskDOT stats + live data

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Data last updated March 2026. Source: Bureau of Transportation Statistics.