Delta Air Lines ATL to STL on-time performance
Delta Air Lines nonstop flights from Atlanta to St. Louis · Aug 2025 – Jul 2026
On-time arrivals
85%
arrived < 15 min late
Cancelled
2.0%
48 flights
Avg arrival delay
10 min
57 min when late
Rank on route
#1 of 3
route average 82% on time
Key facts
- Delta Air Lines flights on ATL to STL arrived on time 85% of the time in Aug 2025 – Jul 2026.
- 2% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 82% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (53%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)53%
- Late-arriving aircraft25%
- Air traffic control & airport congestion15%
- Extreme weather7%
- Security0%
Other airlines on ATL to STL
- Southwest Airlines79% on time · 13 min avg delay
- Frontier Airlines68% on time · 17 min avg delay
Full ATL to STL comparison →
Delta Air Lines on-time record across all routes →
2,357 Delta Air Lines flights tracked on this route; 48 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.