United Airlines ORD to SJU on-time performance
United Airlines nonstop flights from Chicago to San Juan · Aug 2025 – Jul 2026
On-time arrivals
79%
arrived < 15 min late
Cancelled
0.3%
2 flights
Avg arrival delay
11 min
48 min when late
Rank on route
#1 of 4
route average 74% on time
Key facts
- United Airlines flights on ORD to SJU arrived on time 79% of the time in Aug 2025 – Jul 2026.
- 0.3% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 4 airlines on this route, which averaged 74% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (34%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion34%
- Airline (crew, maintenance, cleaning, fueling)31%
- Late-arriving aircraft24%
- Extreme weather11%
- Security0%
Other airlines on ORD to SJU
- American Airlines73% on time · 18 min avg delay
- Spirit Airlines63% on time · 29 min avg delay
- Frontier Airlines61% on time · 88 min avg delay
Full ORD to SJU comparison →
United Airlines on-time record across all routes →
665 United Airlines flights tracked on this route; 2 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.