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

The most reliable airline on the ATL to SAT route is Delta Air Lines, with an on-time arrival rate of 81%.

How often are flights delayed from ATL to SAT?

About 20% of flights from ATL to SAT experience delays. 80% 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 54 minutes.

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

With 80% of ATL to SAT flights arriving on time and an average delay of 54 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 80% of the time. The most reliable airline on this route is Delta Air Lines at 81%. The average delay is 54 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated October 2026.

ATL → SAT on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

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This route is on time most of the time. About 80% of flights arrive on schedule.

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

Accurate?

Delta Air Lines is significantly more reliable on this route at 81% on time vs Frontier Airlines at 62%.

Airline Comparison

Delta Air Lines leads at 81% on time; Frontier Airlines trails at 62%.

Accurate?

Good to know

Departing from ATL

81% on time

Expect ~17 min sitting on the taxiway after your gate pushes back. ATL has long runway queues.

TSA is currently ~27 min. Best time: 4 AM (about 5 min).

More about ATL →

Arriving at SAT

80% on time

When flights into SAT are late, the average delay is 69 minutes. Build buffer if you have ground plans.

If connecting at SAT: TSA is ~26 min right now. Allow at least 60 minutes for a domestic connection.

More about SAT →Connection times at SAT →

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ATL Airport SAT Airport

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