Southwest Airlines DEN to MIA on-time performance
Southwest Airlines nonstop flights from Denver to Miami · Aug 2025 – Jul 2026
On-time arrivals
65%
arrived < 15 min late
Cancelled
0.6%
2 flights
Avg arrival delay
19 min
50 min when late
Rank on route
#4 of 4
route average 74% on time
Key facts
- Southwest Airlines flights on DEN to MIA arrived on time 65% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 9% arrived an hour or more late.
- That ranks #4 of 4 airlines on this route, which averaged 74% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)37%
- Late-arriving aircraft33%
- Air traffic control & airport congestion30%
- Extreme weather0%
- Security0%
Other airlines on DEN to MIA
- United Airlines76% on time · 17 min avg delay
- American Airlines77% on time · 23 min avg delay
- Frontier Airlines73% on time · 17 min avg delay
Full DEN to MIA comparison →
Southwest Airlines on-time record across all routes →
323 Southwest Airlines flights tracked on this route; 2 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.