How often are SFO to IAH flights on time?

Flights from San Francisco (SFO) to Houston (IAH) arrive on time 90% of the time across 18,883 flights of official data.

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

United Airlines has the best on-time record on this route at 90% across 18,883 flights.

Route reliability

Flights from San Francisco to Houston arrive on time 90% of the time across 18,883 flights. Here’s how each airline really performs.

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On-time rate

18,883 flights

Airline	On-time	Flights
United Airlines	90%	18,883

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

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