Frontier Airlines DEN to MIA on-time performance
Frontier Airlines nonstop flights from Denver to Miami · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
0.6%
2 flights
Avg arrival delay
17 min
60 min when late
Rank on route
#3 of 4
route average 74% on time
Key facts
- Frontier Airlines flights on DEN to MIA arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 7% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 74% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (43%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)43%
- Late-arriving aircraft34%
- Air traffic control & airport congestion19%
- Extreme weather4%
- Security0%
Other airlines on DEN to MIA
- United Airlines76% on time · 17 min avg delay
- American Airlines77% on time · 23 min avg delay
- Southwest Airlines65% on time · 19 min avg delay
Full DEN to MIA comparison →
Frontier Airlines on-time record across all routes →
349 Frontier Airlines flights tracked on this route; 2 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.