Spirit Airlines MIA to IAH on-time performance
Spirit Airlines nonstop flights from Miami to Houston · Aug 2025 – Jul 2026
On-time arrivals
68%
arrived < 15 min late
Cancelled
2.9%
11 flights
Avg arrival delay
27 min
84 min when late
Rank on route
#5 of 6
route average 78% on time
Key facts
- Spirit Airlines flights on MIA to IAH arrived on time 68% of the time in Aug 2025 – Jul 2026.
- 2.9% were cancelled, and 15% arrived an hour or more late.
- That ranks #5 of 6 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (46%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion46%
- Late-arriving aircraft34%
- Airline (crew, maintenance, cleaning, fueling)15%
- Extreme weather4%
- Security0%
Other airlines on MIA to IAH
- American Airlines71% on time · 22 min avg delay
- United Airlines86% on time · 13 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 →
Spirit Airlines on-time record across all routes →
380 Spirit Airlines flights tracked on this route; 11 cancelled, 1 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.