United Airlines IAH to MIA on-time performance
United Airlines nonstop flights from Houston to Miami · Aug 2025 – Jul 2026
On-time arrivals
82%
arrived < 15 min late
Cancelled
0.2%
3 flights
Avg arrival delay
12 min
60 min when late
Rank on route
#1 of 6
route average 78% on time
Key facts
- United Airlines flights on IAH to MIA arrived on time 82% of the time in Aug 2025 – Jul 2026.
- 0.2% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 6 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was late-arriving aircraft (35%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft35%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)25%
- Extreme weather7%
- Security0%
Other airlines on IAH to MIA
- American Airlines78% on time · 25 min avg delay
- Spirit Airlines70% on time · 25 min avg delay
- Frontier Airlines68% on time · 52 min avg delay
- Envoy Air79% on time · 12 min avg delay
- Republic Airways64% on time · 62 min avg delay
Full IAH to MIA comparison →
United Airlines on-time record across all routes →
1,469 United Airlines flights tracked on this route; 3 cancelled, 4 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.