How often are IAH to SFO flights on time?

Flights from Houston (IAH) to San Francisco (SFO) arrive on time 88% of the time across 18,798 flights of official data.

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

United Airlines has the best on-time record on this route at 88% across 18,798 flights.

Route reliability

Flights from Houston to San Francisco arrive on time 88% of the time across 18,798 flights. Here’s how each airline really performs.

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On-time rate

18,798 flights

Airline	On-time	Flights
United Airlines	88%	18,798

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

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