United Airlines ORD to PDX on-time performance
United Airlines nonstop flights from Chicago to Portland · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
0.6%
8 flights
Avg arrival delay
18 min
63 min when late
Rank on route
#1 of 3
route average 69% on time
Key facts
- United Airlines flights on ORD to PDX arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 69% 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)27%
- Air traffic control & airport congestion20%
- Extreme weather7%
- Security0%
Other airlines on ORD to PDX
- American Airlines61% on time · 30 min avg delay
- Alaska Airlines72% on time · 17 min avg delay
Full ORD to PDX comparison →
United Airlines on-time record across all routes →
1,404 United Airlines flights tracked on this route; 8 cancelled, 3 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.