United Airlines PWM to ORD on-time performance
United Airlines nonstop flights from Portland to Chicago · Aug 2025 – Jul 2026
On-time arrivals
78%
arrived < 15 min late
Cancelled
2.1%
9 flights
Avg arrival delay
20 min
82 min when late
Rank on route
#3 of 4
route average 78% on time
Key facts
- United Airlines flights on PWM to ORD arrived on time 78% of the time in Aug 2025 – Jul 2026.
- 2.1% were cancelled, and 7% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (68%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion68%
- Airline (crew, maintenance, cleaning, fueling)23%
- Late-arriving aircraft9%
- Extreme weather1%
- Security0%
Other airlines on PWM to ORD
- Republic Airways84% on time · 14 min avg delay
- SkyWest Airlines65% on time · 33 min avg delay
- Envoy Air82% on time · 19 min avg delay
Full PWM to ORD comparison →
United Airlines on-time record across all routes →
429 United Airlines flights tracked on this route; 9 cancelled, 1 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.