How often are SAT to IAH flights on time?

Flights from San Antonio (SAT) to Houston (IAH) arrive on time 91% of the time across 16,039 flights of official data.

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

United Airlines has the best on-time record on this route at 91% across 16,039 flights.

Route reliability

Flights from San Antonio to Houston arrive on time 91% of the time across 16,039 flights. Here’s how each airline really performs.

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On-time rate

16,039 flights

Airline	On-time	Flights
United Airlines	91%	16,039

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

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