OnTimeStats

Historical on-time performance

Houston to Miami

964 miData through Dec 2025Source: US DOT · BTS

Flights on IAH–MIA arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
Median delayon timetypical arrival
p90 delay55 min1 in 10 flights is worsetail risk
Cancelled1.3%of scheduled flights

based on 3,467 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • American Airlines
    On-time74%
    Medianon time
    p9060 min
    Cancel1.5%
    Flights1,460
  • United Airlines
    On-time77%
    Medianon time
    p9045 min
    Cancel1.0%
    Flights1,432
  • Spirit Airlines
    On-time76%
    Medianon time
    p9055 min
    Cancel1.7%
    Flights541
  • Envoy Airbest
    On-time79%
    Medianon time
    p9050 min
    Cancel2.9%
    Flights34

Why flights run late

Delay causes

  • Airline36%
  • Weather9%
  • Air traffic (NAS)18%
  • Late aircraft36%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

Advertisement

Keep exploring

Related pages

Delay predictorfor this route→IAH airportHouston→MIA airportMiami→US Airways on this routecarrier detail→US Airwaysairline profile→

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.