Southwest Airlines MIA to MDW on-time performance
Southwest Airlines nonstop flights from Miami to Chicago · Aug 2025 – Jul 2026
On-time arrivals
67%
arrived < 15 min late
Cancelled
1.6%
7 flights
Avg arrival delay
23 min
66 min when late
Rank on route
#2 of 2
route average 68% on time
Key facts
- Southwest Airlines flights on MIA to MDW arrived on time 67% of the time in Aug 2025 – Jul 2026.
- 1.6% were cancelled, and 10% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 68% 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%
- Air traffic control & airport congestion28%
- Late-arriving aircraft26%
- Extreme weather3%
- Security0%
Other airlines on MIA to MDW
- Frontier Airlines78% on time · 16 min avg delay
Full MIA to MDW comparison →
Southwest Airlines on-time record across all routes →
439 Southwest Airlines flights tracked on this route; 7 cancelled, 5 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.