Southwest Airlines STL to ATL on-time performance
Southwest Airlines nonstop flights from St. Louis to Atlanta · Aug 2025 – Jul 2026
On-time arrivals
80%
arrived < 15 min late
Cancelled
1.1%
12 flights
Avg arrival delay
12 min
56 min when late
Rank on route
#2 of 3
route average 85% on time
Key facts
- Southwest Airlines flights on STL to ATL arrived on time 80% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 6% arrived an hour or more late.
- That ranks #2 of 3 airlines on this route, which averaged 85% on time overall.
- The largest source of delay minutes was late-arriving aircraft (59%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft59%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion14%
- Extreme weather1%
- Security0%
Other airlines on STL to ATL
- Delta Air Lines89% on time · 9 min avg delay
- Frontier Airlines60% on time · 40 min avg delay
Full STL to ATL comparison →
Southwest Airlines on-time record across all routes →
1,105 Southwest Airlines flights tracked on this route; 12 cancelled, 4 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.