American Airlines ORD to STL on-time performance
American Airlines nonstop flights from Chicago to St. Louis · Aug 2025 – Jul 2026
On-time arrivals
66%
arrived < 15 min late
Cancelled
2.8%
14 flights
Avg arrival delay
32 min
90 min when late
Rank on route
#5 of 5
route average 72% on time
Key facts
- American Airlines flights on ORD to STL arrived on time 66% of the time in Aug 2025 – Jul 2026.
- 2.8% were cancelled, and 14% arrived an hour or more late.
- That ranks #5 of 5 airlines on this route, which averaged 72% on time overall.
- The largest source of delay minutes was late-arriving aircraft (56%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft56%
- Airline (crew, maintenance, cleaning, fueling)35%
- Air traffic control & airport congestion5%
- Extreme weather4%
- Security0%
Other airlines on ORD to STL
- SkyWest Airlines70% on time · 23 min avg delay
- Envoy Air75% on time · 14 min avg delay
- United Airlines73% on time · 21 min avg delay
- Republic Airways76% on time · 20 min avg delay
Full ORD to STL comparison →
American Airlines on-time record across all routes →
505 American Airlines flights tracked on this route; 14 cancelled, 1 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.