United Airlines MIA to IAH on-time performance
United Airlines nonstop flights from Miami to Houston · Aug 2025 – Jul 2026
On-time arrivals
86%
arrived < 15 min late
Cancelled
0.4%
6 flights
Avg arrival delay
13 min
91 min when late
Rank on route
#2 of 6
route average 78% on time
Key facts
- United Airlines flights on MIA to IAH arrived on time 86% of the time in Aug 2025 – Jul 2026.
- 0.4% were cancelled, and 5% arrived an hour or more late.
- That ranks #2 of 6 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (32%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)32%
- Air traffic control & airport congestion31%
- Late-arriving aircraft30%
- Extreme weather6%
- Security0%
Other airlines on MIA to IAH
- American Airlines71% on time · 22 min avg delay
- Spirit Airlines68% on time · 27 min avg delay
- Frontier Airlines83% on time · 15 min avg delay
- Envoy Air87% on time · 6 min avg delay
- Republic Airways64% on time · 48 min avg delay
Full MIA to IAH comparison →
United Airlines on-time record across all routes →
1,468 United Airlines flights tracked on this route; 6 cancelled, 3 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.