Which airline is most reliable for BOS (Boston) to SAT (San Antonio)?

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

How often are flights delayed from BOS to SAT?

About 20% of flights from BOS to SAT experience delays. 80% arrive on time.

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

When flights from BOS to SAT are delayed, the average delay is approximately 71 minutes.

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

With 80% of BOS to SAT flights arriving on time and an average delay of 71 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.

BOS → SAT

BOS (Boston) to SAT (San Antonio)

BOS (Boston) 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 71 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).

Source: Bureau of Transportation Statistics. Updated May 2026.

BOS → SAT on-time performance by month

JanFebMarAprMayJunJulAugSepOctNovDec

Worse

Better

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?

Airlines are roughly equal on this route — Delta Air Lines leads slightly at 81% vs JetBlue Airways at 79%.

Airline Comparison

Delta Air Lines leads at 81% on time; JetBlue Airways trails at 79%.

Accurate?

Good to know

Departing from BOS

79% on time

Expect ~19 min sitting on the taxiway after your gate pushes back. BOS has long runway queues.

TSA is currently ~21 min. Best time: 4 AM (about 5 min).

More about BOS →

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 ~18 min right now. Allow at least 60 minutes for a domestic connection.

More about SAT →Connection times at SAT →

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