American Airlines STL to ORD on-time performance
American Airlines nonstop flights from St. Louis to Chicago · Aug 2025 – Jul 2026
On-time arrivals
81%
arrived < 15 min late
Cancelled
2.6%
13 flights
Avg arrival delay
26 min
135 min when late
Rank on route
#1 of 5
route average 73% on time
Key facts
- American Airlines flights on STL to ORD arrived on time 81% of the time in Aug 2025 – Jul 2026.
- 2.6% were cancelled, and 9% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 73% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (52%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)52%
- Late-arriving aircraft27%
- Air traffic control & airport congestion17%
- Extreme weather3%
- Security0%
Other airlines on STL to ORD
- SkyWest Airlines64% on time · 39 min avg delay
- Envoy Air75% on time · 24 min avg delay
- United Airlines72% on time · 24 min avg delay
- Republic Airways75% on time · 20 min avg delay
Full STL to ORD comparison →
American Airlines on-time record across all routes →
502 American Airlines flights tracked on this route; 13 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.