Historical on-time performance
Houston to Miami
Flights on IAH–MIA arrive on time 77% of the time over the last 12 months.
based on 3,459 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time79%Medianon timep9035 minCancel0.5%Flights1,485
- American AirlinesOn-time77%Medianon timep9045 minCancel1.5%Flights1,507
- Spirit AirlinesOn-time70%Medianon timep9085 minCancel2.6%Flights467
Why flights run late
Delay causes
- Airline31%
- Weather10%
- Air traffic (NAS)19%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline16%
- Weather70%
- Air traffic (NAS)14%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 43 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAH → MIA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 82% on time.
- Mornings82% on time · p90 25 min · 3,911 flights
- Middays73% on time · p90 60 min · 2,646 flights
- Overnights68% on time · p90 90 min · 247 flights
- Afternoons67% on time · p90 70 min · 1,413 flights
- Evenings65% on time · p90 85 min · 2,354 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 79% on time.
- Tuesdays79% on time · p90 40 min · 1,403 flights
- Wednesdays77% on time · p90 45 min · 1,448 flights
- Mondays74% on time · p90 55 min · 1,508 flights
- Thursdays73% on time · p90 55 min · 1,561 flights
- Fridays73% on time · p90 60 min · 1,561 flights
- Saturdays71% on time · p90 60 min · 1,511 flights
- Sundays70% on time · p90 70 min · 1,581 flights
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