United Airlines ORD to ATL on-time performance
United Airlines nonstop flights from Chicago to Atlanta · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
1.3%
21 flights
Avg arrival delay
18 min
67 min when late
Rank on route
#5 of 9
route average 75% on time
Key facts
- United Airlines flights on ORD to ATL arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 1.3% were cancelled, and 8% arrived an hour or more late.
- That ranks #5 of 9 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was late-arriving aircraft (46%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft46%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion22%
- Extreme weather6%
- Security0%
Other airlines on ORD to ATL
- Delta Air Lines81% on time · 17 min avg delay
- Frontier Airlines68% on time · 34 min avg delay
- American Airlines65% on time · 32 min avg delay
- Envoy Air78% on time · 15 min avg delay
- Republic Airways70% on time · 20 min avg delay
- Spirit Airlines76% on time · 33 min avg delay
- SkyWest Airlines62% on time · 36 min avg delay
- PSA Airlines80% on time · 12 min avg delay
Full ORD to ATL comparison →
United Airlines on-time record across all routes →
1,668 United Airlines flights tracked on this route; 21 cancelled, 2 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.