Southwest Airlines MDW to DEN on-time performance
Southwest Airlines nonstop flights from Chicago to Denver · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
1.3%
29 flights
Avg arrival delay
16 min
59 min when late
Rank on route
#1 of 2
route average 74% on time
Key facts
- Southwest Airlines flights on MDW to DEN arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 1.3% were cancelled, and 9% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 74% on time overall.
- The largest source of delay minutes was late-arriving aircraft (39%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft39%
- Air traffic control & airport congestion29%
- Airline (crew, maintenance, cleaning, fueling)28%
- Extreme weather3%
- Security1%
Other airlines on MDW to DEN
- Frontier Airlines69% on time · 20 min avg delay
Full MDW to DEN comparison →
Southwest Airlines on-time record across all routes →
2,198 Southwest Airlines flights tracked on this route; 29 cancelled, 8 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.