United Airlines SMF to ORD on-time performance
United Airlines nonstop flights from Sacramento to Chicago · Aug 2025 – Jul 2026
On-time arrivals
81%
arrived < 15 min late
Cancelled
1.3%
13 flights
Avg arrival delay
15 min
75 min when late
Rank on route
#1 of 2
route average 79% on time
Key facts
- United Airlines flights on SMF to ORD arrived on time 81% of the time in Aug 2025 – Jul 2026.
- 1.3% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 79% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (45%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion45%
- Late-arriving aircraft34%
- Airline (crew, maintenance, cleaning, fueling)20%
- Extreme weather1%
- Security0%
Other airlines on SMF to ORD
- American Airlines72% on time · 31 min avg delay
Full SMF to ORD comparison →
United Airlines on-time record across all routes →
987 United Airlines flights tracked on this route; 13 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.