Southwest Airlines ATL to MDW on-time performance
Southwest Airlines nonstop flights from Atlanta to Chicago · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
1.5%
23 flights
Avg arrival delay
16 min
59 min when late
Rank on route
#2 of 3
route average 76% on time
Key facts
- Southwest Airlines flights on ATL to MDW arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 1.5% were cancelled, and 7% arrived an hour or more late.
- That ranks #2 of 3 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was late-arriving aircraft (53%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft53%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion14%
- Extreme weather2%
- Security1%
Other airlines on ATL to MDW
- Delta Air Lines82% on time · 11 min avg delay
- Frontier Airlines65% on time · 33 min avg delay
Full ATL to MDW comparison →
Southwest Airlines on-time record across all routes →
1,543 Southwest Airlines flights tracked on this route; 23 cancelled, 14 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.