United Airlines PDX to ORD on-time performance
United Airlines nonstop flights from Portland to Chicago · Aug 2025 – Jul 2026
On-time arrivals
82%
arrived < 15 min late
Cancelled
0.8%
11 flights
Avg arrival delay
13 min
66 min when late
Rank on route
#1 of 3
route average 79% on time
Key facts
- United Airlines flights on PDX to ORD arrived on time 82% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 79% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (52%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion52%
- Airline (crew, maintenance, cleaning, fueling)23%
- Late-arriving aircraft23%
- Extreme weather1%
- Security0%
Other airlines on PDX to ORD
- American Airlines75% on time · 26 min avg delay
- Alaska Airlines77% on time · 11 min avg delay
Full PDX to ORD comparison →
United Airlines on-time record across all routes →
1,402 United Airlines flights tracked on this route; 11 cancelled, 9 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.