IAH to MIA flight delays
Houston, TX (IAH) Miami, FL (MIA) · 964 miles
277 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
75.09%
Arrived on time
Within 15 minutes of schedule
0.72%
Cancelled
Share of scheduled flights
71 min
When late, late by
Average across delayed arrivals
19 min
Delay per flight
Averaged over every flight flown
What the record says about this route
This is a thin route — 277 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
The 2 airlines here are separated by under 6 points — close enough to call a tie. Choose on price and departure time.
Flights from Houston to Miami run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over March 2025 – August 2026, United Airlines arrived on time most often on IAH to MIA. American Airlines was late most often.
Every airline on IAH to MIA
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| American Airlines | 143 | 72.54% | 0% | 66 min | C |
| United Airlines | 110 | 77.98% | 0% | 82 min | C |
| Frontier Airlines | 23 | 76.19% | 8.7% | 56 min | — |
| Envoy Air | 1 | 100% | 0% | — | — |
The return leg
MIA to IAH Miami back to Houston 79.06% on time BOther routes from Houston
Common questions
Are flights from Houston to Miami usually delayed?
75.09% of flights on the IAH to MIA route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Houston to Miami?
United Airlines, at 77.98% on time across 110 flights. The least punctual on the route was American Airlines at 72.54%.
How often are IAH to MIA flights cancelled?
0.72% of scheduled flights did not operate — about 7 in every thousand. That is in the normal range.
When IAH to MIA flights are late, how late are they?
About 71 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on IAH to MIA during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →