How often are IAH to MIA flights on time?

Flights from Houston (IAH) to Miami (MIA) arrive on time 86% of the time across 19,664 flights of official data.

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

Spirit Airlines has the best on-time record on this route at 88% across 2,243 flights.

Route reliability

Flights from Houston to Miami arrive on time 86% of the time across 19,664 flights. Here’s how each airline really performs.

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On-time rate

19,664 flights

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

How to Pick a Reliable Flight (Not Just the Cheapest)

A practical checklist for booking the flight that gets you there — not just the cheap one.

Nonstop vs. Connecting Flights: The Reliability Trade-off

A stop multiplies the ways a trip can break. When it's worth it — and how to de-risk it.

Do Morning Flights Really Have Fewer Delays?

Yes — and there's a clear reason. How delays snowball through the day.

Are Some Airlines Really More Reliable Than Others?

The reliability gap between airlines is real — here's what actually drives it.

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