United Airlines SAN to ORD on-time performance
United Airlines nonstop flights from San Diego to Chicago · Aug 2025 – Jul 2026
On-time arrivals
81%
arrived < 15 min late
Cancelled
0.5%
9 flights
Avg arrival delay
16 min
80 min when late
Rank on route
#1 of 4
route average 78% on time
Key facts
- United Airlines flights on SAN to ORD arrived on time 81% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 4 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (42%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion42%
- Late-arriving aircraft31%
- Airline (crew, maintenance, cleaning, fueling)25%
- Extreme weather2%
- Security0%
Other airlines on SAN to ORD
- American Airlines78% on time · 21 min avg delay
- Alaska Airlines72% on time · 19 min avg delay
- Frontier Airlines55% on time · 66 min avg delay
Full SAN to ORD comparison →
United Airlines on-time record across all routes →
1,673 United Airlines flights tracked on this route; 9 cancelled, 18 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.