United Airlines SFO to ORD on-time performance
United Airlines nonstop flights from San Francisco to Chicago · Aug 2025 – Jul 2026
On-time arrivals
78%
arrived < 15 min late
Cancelled
0.9%
35 flights
Avg arrival delay
17 min
73 min when late
Rank on route
#1 of 3
route average 76% on time
Key facts
- United Airlines flights on SFO to ORD arrived on time 78% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was late-arriving aircraft (37%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft37%
- Air traffic control & airport congestion37%
- Airline (crew, maintenance, cleaning, fueling)25%
- Extreme weather0%
- Security0%
Other airlines on SFO to ORD
- American Airlines73% on time · 29 min avg delay
- Alaska Airlines53% on time · 24 min avg delay
Full SFO to ORD comparison →
United Airlines on-time record across all routes →
3,830 United Airlines flights tracked on this route; 35 cancelled, 21 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.