How often are IAH to SAT flights on time?

Flights from Houston (IAH) to San Antonio (SAT) arrive on time 85% of the time across 16,284 flights of official data.

Which airline is most reliable on the IAH to SAT route?

United Airlines has the best on-time record on this route at 85% across 16,284 flights.

Route reliability

Flights from Houston to San Antonio arrive on time 85% of the time across 16,284 flights. Here’s how each airline really performs.

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On-time rate

16,284 flights

Airline	On-time	Flights
United Airlines	85%	16,284

On-time = arrived within 15 minutes of schedule, per BTS TranStats. Compare the reverse leg SAT → IAH.

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Score real IAH–SAT flights on reliability, weather, and connection safety — not just price.

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