Frontier Airlines ONT to IAH on-time performance
Frontier Airlines nonstop flights from Ontario to Houston · Aug 2025 – Jul 2026
On-time arrivals
76%
arrived < 15 min late
Cancelled
2.0%
4 flights
Avg arrival delay
19 min
72 min when late
Rank on route
#2 of 2
route average 85% on time
Key facts
- Frontier Airlines flights on ONT to IAH arrived on time 76% of the time in Aug 2025 – Jul 2026.
- 2% were cancelled, and 9% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 85% on time overall.
- The largest source of delay minutes was late-arriving aircraft (48%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft48%
- Air traffic control & airport congestion27%
- Airline (crew, maintenance, cleaning, fueling)24%
- Extreme weather1%
- Security0%
Other airlines on ONT to IAH
- United Airlines90% on time · 10 min avg delay
Full ONT to IAH comparison →
Frontier Airlines on-time record across all routes →
196 Frontier Airlines flights tracked on this route; 4 cancelled, 0 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.