United Airlines ORD to SMF on-time performance
United Airlines nonstop flights from Chicago to Sacramento · Aug 2025 – Jul 2026
On-time arrivals
70%
arrived < 15 min late
Cancelled
1.4%
14 flights
Avg arrival delay
21 min
66 min when late
Rank on route
#1 of 2
route average 68% on time
Key facts
- United Airlines flights on ORD to SMF arrived on time 70% of the time in Aug 2025 – Jul 2026.
- 1.4% were cancelled, and 10% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 68% 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)29%
- Air traffic control & airport congestion17%
- Extreme weather8%
- Security0%
Other airlines on ORD to SMF
- American Airlines62% on time · 26 min avg delay
Full ORD to SMF comparison →
United Airlines on-time record across all routes →
988 United Airlines flights tracked on this route; 14 cancelled, 0 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.