Southwest Airlines MDW to ATL on-time performance
Southwest Airlines nonstop flights from Chicago to Atlanta · Aug 2025 – Jul 2026
On-time arrivals
76%
arrived < 15 min late
Cancelled
1.2%
19 flights
Avg arrival delay
15 min
56 min when late
Rank on route
#2 of 3
route average 79% on time
Key facts
- Southwest Airlines flights on MDW to ATL arrived on time 76% of the time in Aug 2025 – Jul 2026.
- 1.2% were cancelled, and 7% arrived an hour or more late.
- That ranks #2 of 3 airlines on this route, which averaged 79% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (40%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)40%
- Late-arriving aircraft36%
- Air traffic control & airport congestion18%
- Extreme weather4%
- Security2%
Other airlines on MDW to ATL
- Delta Air Lines87% on time · 13 min avg delay
- Frontier Airlines71% on time · 16 min avg delay
Full MDW to ATL comparison →
Southwest Airlines on-time record across all routes →
1,544 Southwest Airlines flights tracked on this route; 19 cancelled, 3 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.