Southwest Airlines MIA to DEN on-time performance
Southwest Airlines nonstop flights from Miami to Denver · Aug 2025 – Jul 2026
On-time arrivals
55%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
30 min
63 min when late
Rank on route
#4 of 4
route average 77% on time
Key facts
- Southwest Airlines flights on MIA to DEN arrived on time 55% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 17% arrived an hour or more late.
- That ranks #4 of 4 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was late-arriving aircraft (42%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft42%
- Air traffic control & airport congestion29%
- Airline (crew, maintenance, cleaning, fueling)23%
- Extreme weather6%
- Security0%
Other airlines on MIA to DEN
- United Airlines83% on time · 13 min avg delay
- American Airlines76% on time · 15 min avg delay
- Frontier Airlines82% on time · 20 min avg delay
Full MIA to DEN comparison →
Southwest Airlines on-time record across all routes →
323 Southwest Airlines flights tracked on this route; 0 cancelled, 6 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.