How often are IAH to SLC flights on time?

Flights from Houston (IAH) to Salt Lake City (SLC) arrive on time 87% of the time across 14,478 flights of official data.

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

Delta Air Lines has the best on-time record on this route at 88% across 6,614 flights.

Route reliability

Flights from Houston to Salt Lake City arrive on time 87% of the time across 14,478 flights. Here’s how each airline really performs.

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On-time rate

14,478 flights

Airline	On-time	Flights
Delta Air Lines	88%	6,614
United Airlines	86%	7,864

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

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

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