United Airlines MIA to ORD on-time performance
United Airlines nonstop flights from Miami to Chicago · Aug 2025 – Jul 2026
On-time arrivals
70%
arrived < 15 min late
Cancelled
1.0%
11 flights
Avg arrival delay
27 min
86 min when late
Rank on route
#3 of 4
route average 71% on time
Key facts
- United Airlines flights on MIA to ORD arrived on time 70% of the time in Aug 2025 – Jul 2026.
- 1% were cancelled, and 12% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 71% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (47%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion47%
- Late-arriving aircraft32%
- Airline (crew, maintenance, cleaning, fueling)16%
- Extreme weather5%
- Security0%
Other airlines on MIA to ORD
- American Airlines72% on time · 22 min avg delay
- Spirit Airlines63% on time · 24 min avg delay
- Frontier Airlines73% on time · 49 min avg delay
Full MIA to ORD comparison →
United Airlines on-time record across all routes →
1,070 United Airlines flights tracked on this route; 11 cancelled, 7 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.